Python判读变量是否定义用什么方法，python判读变量定义,if 语句fooVar

文章由Byrx.net分享于2019-03-23 05:03:26评论（289）

Python判读变量是否定义用什么方法，python判读变量定义,if 语句fooVar


if 语句

fooVar = 0# 类似与下面的这种：if fooVar:    # passelse:    # fooVar = something else...
try:  fooVarexcept NameError:  print "well, it WASN'T defined after all!"else:  print "sure, it was defined."

我只是搬运工，Determine if variable is defined in Python

fooVar=0
vardict=dir()
if 'fooVar' in vardict:
print("TRUE")
else:
print("FALSE")

编橙之家文章，

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