[英]Search for a line that contains some text, replace complete line python
因此,我嘗試搜索某個特定的字符串,例如:process.control.timeout = 30,但30可以是任何字符串。 我嘗試了這個:
for line in process:
line = line.replace("process.control.timeout", "process.control.timeout=900")
outFile.write(line)
但這會帶我回去process.control.timeout = 900 = 30。 我覺得我需要將正則表達式與通配符一起使用? 但是我對python很陌生。
沒有正則表達式:
for line in process:
if "process.control.timeout" in line:
# You need to include a newline if you're replacing the whole line
line = "process.control.timeout=900\n"
outFile.write(line)
要么
outFile.writelines("process.control.timeout=900\n"
if "process.control.timeout" in line else line
for line in process)
如果您要匹配的文本在行的開頭,請在line中使用line.startswith("process.control.timeout")
而不是"process.control.timeout" in line
。
您是對的,正則表達式是解決之道。
import re
pattern = re.compile(r"process\.control\.timeout=\d+")
for line in process:
line = pattern.sub("process.control.timeout=900", line)
outFile.write(line)
這可能是您想要的(匹配=
和=
后的數字是可選的)。 在循環搜索和替換時,單獨編譯regex比直接使用re.sub
更有效。
import re
pattern = re.compile(r'process\.control\.timeout(=\d+)?')
for line in process:
pattern.sub('process.control.timeout=900', line)
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