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<p><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">Dear Astropy community,</span><br>
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<p>I'm having a little problem with a script that I am using. The parts of the script which is giving me the problems are as follows:</p>
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<pre class="lang-py prettyprint prettyprinted" style="margin-top: 0px; padding: 5px; border: 0px; font-size: 13px; overflow: auto; width: auto; max-height: 600px; background-color: rgb(238, 238, 238); font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; color: rgb(57, 51, 24); word-wrap: normal;"><code style="margin: 0px; padding: 0px; border: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; white-space: inherit;"><span class="com" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 128, 128);">#Function to replace all NaNs in the exposure map by 0s and to replace the corresponding pixels in the sky and large scale sensitivity map by 0s.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
</span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 139);">def</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> replace_nan</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">filename</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">):</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
</span><span class="com" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 128, 128);">#Print that all NaNs will be replaced by 0s in the exposure map and that the corresponding pixels in the sky and large scale sensitivity map will also be replaced by 0s.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
</span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 139);">print</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> </span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"All NaNs will be replaced by 0s in "</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">+</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> filename </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">+</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> </span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">" and the corresponding pixels in the sky and large scale sensitivity map will also be replaced by 0s."</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
</span><span class="com" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 128, 128);">#Open the exposure map, the corresponding sky and large scale sensitivity map and copy the primary headers (extension 0 of hdulist) to new hdulists.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
hdulist_ex </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> fits</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">open</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">filename</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">)</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
new_hdu_header_ex </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> fits</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">PrimaryHDU</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">header</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">hdulist_ex</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">[</span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">].</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">header</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">)</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
new_hdulist_ex </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> fits</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">HDUList</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">([</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">new_hdu_header_ex</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">])</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
hdulist_sk </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> fits</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">open</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">filename</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">replace</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"ex"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">,</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"sk_corrected"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">))</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
new_hdu_header_sk </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> fits</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">PrimaryHDU</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">header</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">hdulist_sk</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">[</span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">].</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">header</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">)</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
new_hdulist_sk </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> fits</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">HDUList</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">([</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">new_hdu_header_sk</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">])</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
hdulist_lss </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> fits</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">open</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">filename</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">replace</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"ex"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">,</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"lss_m"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">))</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
new_hdu_header_lss </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> fits</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">PrimaryHDU</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">header</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">hdulist_lss</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">[</span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">0</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">].</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">header</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">)</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
new_hdulist_lss </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> fits</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: rgb(43, 145, 175);">HDUList</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">([</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">new_hdu_header_lss</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">])</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
</span><span class="com" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 128, 128);">#For all frames in the image: Create the mask and run the function replace_pix.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
</span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 139);">for</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> i </span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 139);">in</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> range</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="lit" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">1</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">len</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">hdulist_ex</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">)):</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
mask </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">=</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> np</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">isnan</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">hdulist_ex</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">[</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">i</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">].</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">data</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">)</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
replace_pix</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">hdulist_ex</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">[</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">i</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">],</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">mask</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">new_hdulist_ex</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">)</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
replace_pix</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">hdulist_sk</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">[</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">i</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">],</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">mask</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">new_hdulist_sk</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">)</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
replace_pix</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">hdulist_lss</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">[</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">i</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">],</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">mask</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">,</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">new_hdulist_lss</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">)</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
</span><span class="com" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 128, 128);">#Write the new hdulists to new images.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
new_hdulist_ex</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">writeto</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">filename</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">replace</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">".img"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">,</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"_new.img"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">))</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
new_hdulist_sk</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">writeto</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">filename</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">replace</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"ex.img"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">,</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"sk_new.img"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">))</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
new_hdulist_lss</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">writeto</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">filename</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">replace</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"ex.img"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">,</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"lss_new.img"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">))</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
</span><span class="com" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 128, 128);">#Print that all NaNs are replaced by 0s in the exposure map and that the corresponding pixels in the sky and large scale sensitivity map are also replaced by 0s.</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">
</span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 139);">print</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> </span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"All NaNs are replaced by 0s in "</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">+</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> filename </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">+</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);"> </span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">" and the corresponding pixels in the sky and large scale sensitivity map are also replaced by 0s."</span></code></pre>
<p><span style="font-size: 12pt;"><br>
</span></p>
<p>When running:</p>
<p><br>
</p>
<pre class="lang-py prettyprint prettyprinted" style="margin-top: 0px; padding: 5px; border: 0px; font-size: 13px; overflow: auto; width: auto; max-height: 600px; background-color: rgb(238, 238, 238); font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; color: rgb(57, 51, 24); word-wrap: normal;"><code style="margin: 0px; padding: 0px; border: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; white-space: inherit;"><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">replace_nan</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">(</span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"/Users/.../sw00031048001uw1_ex.img"</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: rgb(0, 0, 0);">)</span></code></pre>
<p><span style="font-size: 12pt;">(where I have dotted out my path for convenience.) </span><span style="font-size: 12pt;">it is failing on (traceback) is </span><span class="pln" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">hdulist_sk </span><span class="pun" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">=</span><span class="pln" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;"> fits</span><span class="pun" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">.</span><span class="pln" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">open</span><span class="pun" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">(</span><span class="pln" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">filename</span><span class="pun" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">.</span><span class="pln" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">replace</span><span class="pun" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">(</span><span class="str" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"ex"</span><span class="pun" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">,</span><span class="str" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px; color: rgb(128, 0, 0);">"sk_corrected"</span><span class="pun" style="white-space: inherit; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, sans-serif; font-size: 13px; margin: 0px; padding: 0px; border: 0px;">))</span><span style="font-size: 12pt;"> </span></p>
<p><span style="font-size:12pt"></span></p>
<p><span style="font-size:12pt"><br>
</span></p>
<p><span style="font-size:12pt">The error is simply </span></p>
<p><span style="font-size:12pt"><br>
</span></p>
<pre style="overflow:auto; font-size:14px; padding:0px; margin-top:0px; margin-bottom:0px; line-height:inherit; word-break:break-all; word-wrap:break-word; background-color:transparent; border:0px; border-top-left-radius:0px; border-top-right-radius:0px; border-bottom-right-radius:0px; border-bottom-left-radius:0px; white-space:pre-wrap; vertical-align:baseline"><span class="ansicyan" style="color:rgb(70,130,180)"><span class="ansigreen" style="color:rgb(0,100,0)"><span class="ansicyan" style="color:rgb(70,130,180)"><span class="ansigreen" style="color:rgb(0,100,0)"><span class="ansicyan" style="color:rgb(70,130,180)"><span class="ansigreen" style="color:rgb(0,100,0)"><span class="ansired" style="color:rgb(139,0,0)"><span class="ansired" style="">IOError</span>: [Errno 2] No such file or directory: '/Users/.../sw00031048001uw1_sk_corrected.img'</span></span></span></span></span></span></span></pre>
<p><span style="font-size:12pt">But this is the file I am attempting to create by replacing </span><span style="color:rgb(139,0,0); font-size:14px; white-space:pre-wrap; background-color:transparent">'/Users/.../sw00031048001uw1_ex.img'</span></p>
<p><span style="font-size:12pt"><br>
</span></p>
<p><span style="font-size: 12pt;">I'm within the iPython development environment (if that helps, or if that is relevant). </span>I'm guessing at this stage that maybe I don't have permissions to be messing around with files from the iPython console? Or I need
some extra arguments for this to work...<span style="font-size:12pt"><br>
</span></p>
<p><br>
</p>
<p>Any suggestions would be warmly welcomed.</p>
<p><br>
</p>
<p>Many thanks,</p>
<p><br>
</p>
<p>Michael Roberts</p>
<p><span style="font-size:12pt"><br>
</span></p>
<p><span style="font-size:12pt"><br>
</span></p>
<p><span style="font-size:12pt"><br>
</span></p>
<p><span style="font-size:12pt"><br>
</span></p>
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