如何在屏幕上随机选择文本

Question

如何使用Python选择固定文本之后的随机文本？例如"；AWB编号56454546"；其中"；AWB NO"；是固定文本，而"；56454546"；是随机文本。

Answer 1

您可以为此使用partition方法。它是内置str类型的一部分。

>>> help(str.partition)
partition(self, sep, /)
Partition the string into three parts using the given separator.
This will search for the separator in the string.  If the separator is found,
returns a 3-tuple containing the part before the separator, the separator
itself, and the part after it.
If the separator is not found, returns a 3-tuple containing the original string
and two empty strings.

如果您使用"AWB No: "作为分隔符，您将返回一个包含以下内容的3元组：

• "AWB No: "之前的所有内容，例如"Courier "
• 分隔符："AWB No: "
• "AWB No: ":"56454546"之后的所有内容

所以你可以得到"；在"；以两种方式组成：

input_str = "Courier AWB No: 56454546"
sep = "AWB No: "
before, sep, after = input_str.partition(sep)
# == "Courier ", "AWB No: ", "56454546"
# or
after = input_str.partition(sep)[2]
# either way: after == "56454546"

如果数字后面有更多的单词，你可以用.split()[0]:去掉它们

input_str = "Courier AWB No: 56454546 correct horse battery staple"
sep = "AWB No: "
after = input_str.partition(sep)[2]
awb_no = after.split()[0]
# after == "56454546"

或者在一行中：

input_str = "Courier AWB No: 56454546 correct horse battery staple"
awb_no = input_str.partition("AWB No: ")[2].split()[0]