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#6423 has_key -> in

This commit is contained in:
Ezio Melotti 2009-07-22 21:08:49 +00:00
parent 46ca2f25eb
commit 7fc214b55d
1 changed files with 8 additions and 7 deletions
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15
Doc/library/cgi.rst
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@ -91,12 +91,13 @@ form contents from standard input or the environment (depending on the value of
various environment variables set according to the CGI standard). Since it may
consume standard input, it should be instantiated only once.
The :class:`FieldStorage` instance can be indexed like a Python dictionary, and
also supports the standard dictionary methods :meth:`has_key` and :meth:`keys`.
The built-in :func:`len` is also supported. Form fields containing empty
strings are ignored and do not appear in the dictionary; to keep such values,
provide a true value for the optional *keep_blank_values* keyword parameter when
creating the :class:`FieldStorage` instance.
The :class:`FieldStorage` instance can be indexed like a Python dictionary.
It allows membership testing with the :keyword:`in` operator, and also supports
the standard dictionary method :meth:`keys` and the built-in function
:func:`len`. Form fields containing empty strings are ignored and do not appear
in the dictionary; to keep such values, provide a true value for the optional
*keep_blank_values* keyword parameter when creating the :class:`FieldStorage`
instance.
For instance, the following code (which assumes that the
:mailheader:`Content-Type` header and blank line have already been printed)
@ -104,7 +105,7 @@ checks that the fields ``name`` and ``addr`` are both set to a non-empty
string::
form = cgi.FieldStorage()
if not (form.has_key("name") and form.has_key("addr")):
if "name" not in form or "addr" not in form:
print "<H1>Error</H1>"
print "Please fill in the name and addr fields."
return