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Insist that the argument to TextIOWrapper.write() is a basestring

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instance.  This was effectively already the case, but the error
reporting was lousy.
This commit is contained in:
Guido van Rossum 2007-08-29 18:10:08 +00:00
parent e8a17aafca
commit dcce8391d1
1 changed files with 3 additions and 0 deletions
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3
Lib/io.py
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@ -1093,6 +1093,9 @@ class TextIOWrapper(TextIOBase):
def write(self, s: str): def write(self, s: str):
if self.closed: if self.closed:
raise ValueError("write to closed file") raise ValueError("write to closed file")
if not isinstance(s, basestring):
raise TypeError("can't write %s to text stream" %
s.__class__.__name__)
haslf = "\n" in s haslf = "\n" in s
if haslf and self._writetranslate and self._writenl != "\n": if haslf and self._writetranslate and self._writenl != "\n":
s = s.replace("\n", self._writenl) s = s.replace("\n", self._writenl)