关于 Python 中的范围 [重复]

Question

在此代码中，pelts 在 with 语句中定义以打开文件。命令“打印”能够访问它（Python 2.7）。像 with、for、while 这样的代码段不会像函数那样限制范围吗？

def run_funct():
''' (input_type) -> output_type

Function docstring
'''

# Put the file into a file handler
with open('hopedale.txt') as hopedale_file:

    # Read first line and move file cursor to the beginning of next line
    hopedale_file.readline()

    # We know that info lines begin on the second line, and 'startswith'
    # a `#` symbol, skip these lines after processing the first one.
    data = hopedale_file.readline().strip()
    while data.startswith('#'):
        data = hopedale_file.readline().strip()

    # When the input line no longer begins with a '#' symbol, store
    # the number of pelts on the first data line
    pelts = int(data)

    # Then process the rest of the lines with 'for ___ in'
    for data in hopedale_file:
        pelts += int(data.strip())

# Print pelts
print 'Number of pelts is:', pelts

Answer 1

在 python 中，only 函数和类定义了新的作用域。 if、for、while、with 等不要！

Answer 2

pelts 在全局范围内，因此在with 之外可用。 with 不会创建自己的作用域。