使用(?s)，这将多行视为单行.因此，点匹配所有字符，包括换行符.

Use (?s), this is consider multiple line as a single line. So dot match all characters including newlines.

pattern = re.compile(r'(?s)begin MEASUREMENT[\s](.*?)end MEASUREMENT')

所以尝试一下，

import re
path = "py.txt"
file = open(path, 'r')
lines = file.read()
pattern = re.compile(r'(?s)begin MEASUREMENT[\s](.*?)end MEASUREMENT')
result = re.findall(pattern, lines)
print result[0]

已编辑

t = "XYZ"
pattern = re.compile(r'(?s)begin MEASUREMENT\s+((%s).*?)end MEASUREMENT'%t)