Python: re.sub，试图将"001 :未知，测试“与”Flow\临时\001:未知，测试“一起测试会在第5位置给出错误的逃逸\T

Question

import re

actual_string = "001 : Unknown, testing"

pattern_sub = r"Flows\Temporary\001 : Unknown"
pattern_to_sub = "001 : Unknown"
actual_string = re.sub(pattern_to_sub, pattern_sub, actual_string)
print(actual_string)

错误：第1024行，在parse_template中引发s.error(‘坏逃逸%s’% this，len(This) re.error:坏逃逸\T在第5位置

预期结果：流\临时\001:未知，测试

Answer 1

需要使用re.escape，下面的示例适用于我：

cat re_issue.py
#!/usr/bin/python3.9
import re

actual_string = "001 : Unknown, testing"

pattern_sub = r"Flows\Temporary\001 : Unknown"
pattern_to_sub = "001 : Unknown"
actual_string = re.sub(pattern_to_sub, re.escape(pattern_sub), actual_string)
print(actual_string)

re_issue.py
Flows\Temporary\001\ :\ Unknown, testing

为了获得预期的产出，还应做更多的工作：

cat re_issue1.py
#!/usr/bin/python3.9
import re

actual_string = "001 : Unknown, testing"

pattern_sub = r"Flows\Temporary\001:Unknown"
pattern_to_sub = "001 : Unknown"
actual_string1 = re.sub(pattern_to_sub, re.escape(pattern_sub), actual_string)
pattern_sub1 = " : "
pattern_to_sub1 = ":"
actual_string2 = re.sub(pattern_to_sub1, pattern_sub1, actual_string1)
print(actual_string2)

re_issue1.py
Flows\Temporary\001 : Unknown, testing