[Python-checkins] peps: Added another run time error example.

[eric.smith]

https://hg.python.org/peps/rev/b658dd445504
changeset:   5926:b658dd445504
user:        Eric V. Smith <eric at trueblade.com>
date:        Fri Aug 07 22:25:27 2015 -0400
summary:
  Added another run time error example.

files:
  pep-0498.txt |  15 +++++++++++++--
  1 files changed, 13 insertions(+), 2 deletions(-)


diff --git a/pep-0498.txt b/pep-0498.txt
--- a/pep-0498.txt
+++ b/pep-0498.txt
@@ -276,8 +276,8 @@
   SyntaxError: invalid syntax
 
 Run time errors occur when evaluating the expressions inside an
-f-string. Note that an f-string can be executed multiple times, and
-work sometimes and raise an error other times::
+f-string. Note that an f-string can be evaluated multiple times, and
+work sometimes and raise an error at other times::
 
   >>> d = {0:10, 1:20}
   >>> for i in range(3):
@@ -289,6 +289,17 @@
     File "<stdin>", line 2, in <module>
   KeyError: 2
 
+or::
+
+  >>> for x in (32, 100, 'fifty'):
+  ...   f'x = {x:+3}'
+  ...
+  'x = +32'
+  'x = +100'
+  Traceback (most recent call last):
+    File "<stdin>", line 2, in <module>
+  ValueError: Sign not allowed in string format specifier
+
 Leading whitespace in expressions is skipped
 --------------------------------------------
 

-- 
Repository URL: https://hg.python.org/peps