如何在命令行中创建用于获取输入字符串的自定义标记，并将它们存储在Python中的变量中

获取输入的格式为：

myprogram.py -f "string1" -t "string2" -i "string 3 some directory path"

---

您应该使用

argparse

Python模块来解析CLI参数。我给你写了一个例子

argparse

的官方文档：

代码：

from argparse import ArgumentParser

parser = ArgumentParser(description=__doc__)

parser.add_argument(
    "-f",
    dest="first_string",
    help="Your first string parameter",
    required=True,
)

parser.add_argument(
    "-t",
    dest="second_string",
    help="Your second string parameter",
    required=True,
)

parser.add_argument(
    "-i",
    dest="third_string",
    help="Your third string parameter",
    required=True,
)

input_parameters, unknown_input_parameters = parser.parse_known_args()

# Set CLI argument variables.
first_arg = input_parameters.first_string
second_arg = input_parameters.second_string
third_arg = input_parameters.third_string

print("-f: {}\n"
      "-t: {}\n"
      "-i: {}".format(first_arg, second_arg, third_arg))

>>> python3 test.py -f "string1" -t "string2" -i "string 3 some directory path"
-f: string1
-t: string2
-i: string 3 some directory path

>>> python3 test.py -t "string1" -f "string2" -i "string 3 some directory path"
-f: string2
-t: string1
-i: string 3 some directory path

>>> python3 test.py -t "string1" -f "string2" -i "string 3 some directory path" -x "Unused"
-f: string2
-t: string1
-i: string 3 some directory path

>>> python3 test.py -t "string1" -i "string 3 some directory path"
usage: test.py [-h] -f FIRST_STRING -t SECOND_STRING -i THIRD_STRING
test.py: error: the following arguments are required: -f

>>> python3 test.py -h
usage: test.py [-h] -f FIRST_STRING -t SECOND_STRING -i THIRD_STRING

optional arguments:
  -h, --help        show this help message and exit
  -f FIRST_STRING   Your first string parameter
  -t SECOND_STRING  Your second string parameter
  -i THIRD_STRING   Your third string parameter

一些输出：

from argparse import ArgumentParser

parser = ArgumentParser(description=__doc__)

parser.add_argument(
    "-f",
    dest="first_string",
    help="Your first string parameter",
    required=True,
)

parser.add_argument(
    "-t",
    dest="second_string",
    help="Your second string parameter",
    required=True,
)

parser.add_argument(
    "-i",
    dest="third_string",
    help="Your third string parameter",
    required=True,
)

input_parameters, unknown_input_parameters = parser.parse_known_args()

# Set CLI argument variables.
first_arg = input_parameters.first_string
second_arg = input_parameters.second_string
third_arg = input_parameters.third_string

print("-f: {}\n"
      "-t: {}\n"
      "-i: {}".format(first_arg, second_arg, third_arg))

>>> python3 test.py -f "string1" -t "string2" -i "string 3 some directory path"
-f: string1
-t: string2
-i: string 3 some directory path

>>> python3 test.py -t "string1" -f "string2" -i "string 3 some directory path"
-f: string2
-t: string1
-i: string 3 some directory path

>>> python3 test.py -t "string1" -f "string2" -i "string 3 some directory path" -x "Unused"
-f: string2
-t: string1
-i: string 3 some directory path

>>> python3 test.py -t "string1" -i "string 3 some directory path"
usage: test.py [-h] -f FIRST_STRING -t SECOND_STRING -i THIRD_STRING
test.py: error: the following arguments are required: -f

>>> python3 test.py -h
usage: test.py [-h] -f FIRST_STRING -t SECOND_STRING -i THIRD_STRING

optional arguments:
  -h, --help        show this help message and exit
  -f FIRST_STRING   Your first string parameter
  -t SECOND_STRING  Your second string parameter
  -i THIRD_STRING   Your third string parameter

---

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