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January 2022

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question about a bug when lxml runs in a conda environment
by Martin Mueller Jan. 6, 2022

Jan. 6, 2022

I have used lxml extensively in a Pycharm environment that calls on a conda environment. Lately I encountered an odd error. The correct output of a marylamb.py script goes like this: <l xmlns="http://www.tei-c.org/ns/1.0"> Mary had a little lamb,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> Its fleece was white as snow, yeah.</l> <l xmlns="http://www.tei-c.org/ns/1.0"> Everywhere the child went,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> The little lamb was sure to go, yeah.</l> <l xmlns="http://www.tei-c.org/ns/1.0"> He followed her to school one day,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> And broke the teacher's rule.</l> <l xmlns="http://www.tei-c.org/ns/1.0"> What a time did they have,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> That day at school.</l> <l xmlns="http://www.tei-c.org/ns/1.0"> Tisket, tasket,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> A green and yellow basket.</l> <l xmlns="http://www.tei-c.org/ns/1.0"> Sent a letter to my baby,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> On my way I passed it.</l> In the buggy output the script runs amok and prints the current line plus the rest of the text. I print it out at the end of this memo. The Pycharms folks were able to identify the conda environment as the likely culprit. If I run the script outside it doeesn’t happen. The problem seems to be limited to lxml running in a conda environment, because scripts that don’t use lxml are not plague by that bug. Has anybody encountered a similar problem or has a suggestion how to fix it. I guess not using conda is an option, but it’s convenient in many other ways. Here is the buggy output, with an empty line added after each line to make it a little more readable <l xmlns="http://www.tei-c.org/ns/1.0"> Mary had a little lamb,</l><l> Its fleece was white as snow, yeah.</l><l> Everywhere the child went,</l><l> The little lamb was sure to go, yeah.</l></lg><lg><l> He followed her to school one day,</l><l> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> Its fleece was white as snow, yeah.</l><l> Everywhere the child went,</l><l> The little lamb was sure to go, yeah.</l></lg><lg><l> He followed her to school one day,</l><l> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> Everywhere the child went,</l><l> The little lamb was sure to go, yeah.</l></lg><lg><l> He followed her to school one day,</l><l> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> The little lamb was sure to go, yeah.</l></lg><lg><l> He followed her to school one day,</l><l> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> He followed her to school one day,</l><l> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> On my way I passed it.</l></lg></div></body></text></TEI>

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