【发布时间】：2012-09-11 15:49:30
【问题描述】：
我的导师 Barry 总是因为我忘记在逗号、等号后面加空格以及在文件末尾留下太多行而责备我。我想练习一些 python 并编写一个解析器来检查我的文件，然后再将它们呈现给他。
#BarryParser v0.1
from re import findall, search
def comma_checker(line, lineno):
""" Checks commas have a space after them """
split_line = line.split(', ')
for string in split_line:
found_error = findall('.*,.*', string)
if found_error:
print "BARRY ISSUE DETECTED: COMMA ERROR LINE: %s: %s" % (lineno, line)
def equals_checker(line, lineno):
split_line = line.split(' = ')
for string in split_line:
found_error = findall('.*==?.*', string)
if found_error:
print "BARRY ISSUE DETECTED: EQUALS ERROR LINE: %s: %s" % (lineno, line)
def too_many_blank_lines(lines):
"""if the last line is a new line and the line before is also a new line,
rasises barry issue over too many blank lines
"""
last_line = lines[len(lines)-1]
second_to_last_line = lines[len(lines)-2]
if last_line == "\n" and second_to_last_line == "\n":
print "BARRY ISSUE DETECTED: TOO MANY BLANK LINES AT END OF TEXT"
elif search('\t*\n{1}', last_line)and search('\t*\n{1}', second_to_last_line):
print "BARRY ISSUE DETECTED: TOO MANY BLANK LINES AT END OF TEXT"
elif search('\t*\n{1}', second_to_last_line) and last_line == "\n":
print "BARRY ISSUE DETECTED: TOO MANY BLANK LINES AT END OF TEXT"
def main():
file = open("test.txt")
line_no = 0
lines = file.readlines(100000)
too_many_blank_lines(lines) #CHECK FOR BLANK LINES AT END OF TEXT
for line in lines:
line_no +=1
if not line == "\n":
if not line[:1] == "#":
comma_checker(line, line_no) #CHECK COMMAS ARE DONE RIGHT
equals_checker(line, line_no) #CHECK EQUALS HAVE SPACES AFTER & BEFORE
if __name__ == '__main__':
main()
它将解析 python 文件。问题是，我不知道如何让等号位以相同的方式处理 == 和 =。
【问题讨论】：
-
有几个工具可以很好地为您完成此类工作：PyLint, PyChecker or PyFlakes?。例如，查看pypi.python.org/pypi/pep8 为您进行这些测试。
-
你想解决什么问题？
-
您可以使用PythonTidy。因此，无需重新发明轮子。你可以像
python PythonTidy test.py barryfile.py一样使用它。 -
如果这是一个学习python的练习，你的问题可能更适合CodeReview