python - 如何在 Python 中拆分记录？

Question

我正在尝试使用 split 函数在 python 中拆分记录，但无法实现实际结果。

下面是我的 .txt 文件的内容:

10000  {(10000,200,300,A),(10000,200,300,B)},{(10000,200,300,C),(10000,200,300,D)}
10001  {(10001,200,300,E),(10001,200,300,F)},{(10001,200,300,G),(10001,200,300,H)}

这是期望的输出:

10000  10000,200,300,A
10000  10000,200,300,B
10000  10000,200,300,C
10000  10000,200,300,D
10001  10001,200,300,E
10001  10001,200,300,F
10001  10001,200,300,G
10001  10001,200,300,H

如有任何帮助，我们将不胜感激。

Answer 1

这是获得所需结果的最简单方法，它只需要 re 包中的 sub 和 findall 方法即可工作。

from re import sub, findall

string = """
  10000 {(10000,200,300,A),(10000,200,300,B)},{(10000,200,300,C),(10000,200,300,D)}
  10001 {(10001,200,300,E),(10001,200,300,F)},{(10001,200,300,G),(10001,200,300,H)}
"""

# our results go here
results = []

# loop through each line in the string
for line in string.split("\n"):
  # get rid of leading and trailing whitespace
  line = line.strip()
  # ignore empty lines
  if len(line) > 0:
    # get the line's id
    id = line.split("{")[0].strip()
    # get all values wrapped in parenthesis
    for match in findall("(\(.*?\))", string):
      # add the string to the results list
      results.append("{} {}".format(id, sub(r"\{|\}", "", match)))

# display the results
print(results)

下面是函数形式的相同代码:

from re import sub, findall

def get_records(string):
  # our results go here
  results = []
  # loop through each line in the string
  for line in string.split("\n"):
    # get rid of leading and trailing whitespace
    line = line.strip()
    # ignore empty lines
    if len(line) > 0:
      # get the line's id
      id = line.split("{")[0].strip()
      # get all values wrapped in parenthesis
      for match in findall("(\(.*?\))", string):
        # add the string to the results list
        results.append("{} {}".format(id, sub(r"\{|\}", "", match)))
  # return the results list
  return results

然后您将像这样使用该函数:

# print the results
print(get_records("""
  10000 {(10000,200,300,A),(10000,200,300,B)},{(10000,200,300,C),(10000,200,300,D)}
  10001 {(10001,200,300,E),(10001,200,300,F)},{(10001,200,300,G),(10001,200,300,H)}
"""))

祝你好运。