>>> import string>>> string.atoi('10') + 414分析：错误原因说，name 'string' is not defined...
发现如果习惯了一个编程语言，想当然的往另一个上套，是要吃大亏的，这是一个真实的经历。我最早学的...
importrandom# ⛔️ ['__builtins__', '__cached__', '__doc__', '__file__',# '__loader__', '__name__', '__package__', '__spec__']print(dir(random)) If you pass a module object to thedir()function, it returns a list of names of the module's attributes. If you...
Theexpressionargument is parsed and evaluated as a Python expression (technically speaking, a condition list) using theglobalsandlocalsdictionaries as global and local namespace. If theglobalsdictionary is present and lacks ‘__builtins__’, the current globals are copied intoglobalsbeforeexpressionis ...
>>> help(eval) Help on built-in function eval in module builtins: eval(source, globals=None, locals=None, /) Evaluate the given source in the context of globals...
NameError: name 'dude' is not defined 我运行的是Mac OS X 10.9.1,我使用的是Python 3.3安装时附带的Python Launcher应用程序来运行脚本。 您正在运行Python 2,而不是Python 3。为了在Python 2中工作,使用raw_input。 input_variable = raw_input ("Enter your name: ") ...
Also here is another alternative without a try block: def input_compatible(prompt=None): input_func = raw_input if "raw_input" in __builtins__.__dict__ else input return input_func(prompt) Share Improve this answer Follow edited Sep 9, 2021 at 18:47 answered Oct 11, 2020 at ...
内建作用域是通过一个名为 builtin 的标准模块来实现的,但是这个变量名自身并没有放入内置作用域内,所以必须导入这个文件才能够使用它。在 Python3.0 中,可以使用以下的代码来查看到底预定义了哪些变量: import builtinsdir(builtins)['ArithmeticError','AssertionError','AttributeError','BaseException','Blocking...
ERROR: /Users/buildkite/builds/bk-macos-pln3-7ote/bazel-org-repo-root/bazel/WORKSPACE.bzlmod:48:1: name 'android_sdk_repository' is not defined (06:47:28) WARNING: Option 'experimental_build_event_json_file_path_conversion' is deprecated: Use --build_event_json_file_path_conversion instea...
>>> dir(builtins) 1. 2. Python 中只有模块(module),类(class)以及函数(def、lambda)才会引入新的作用域,其它的代码块(如 if/elif/else/、try/except、for/while等)是不会引入新的作用域的,也就是说这些语句内定义的变量,外部也可以访问,如下代码: ...