# Replace string in the same File fin = open("D:/work/20190810/input.txt", "rt") data = fin.read() data = data.replace("pyton", "python") fin.close() fin = open("D:/work/20190810/input.txt", "wt") fin.write(data
str5 = 'python' print(str3.replace('world', str5)) print(str3.replace('l', 't')) # 将l替换为t,不限制替换次数 print(str3.replace('l', 't', 2)) # 将l替换为t,限制最多替换2次 1. 2. 3. 4. 5. 6. 输出为: hello, python! hetto, wortd! hetto, world! 同样,我们也可以...
msg2 = msg.replace('fox', 'wolf') print(msg2) In the example, both occurrences of word 'fox' are replaced with 'wolf'. $ ./replacing.py There is a wolf in the forest. The wolf has red fur. Alternatively, we can use the str.replace method. It takes the string on which we do...
问在python中用新字符串替换字符串后读取文件并写入其内容EN❯ python3 main.py ❯ cat file.txt ...
/usr/bin/python2importfileinput,glob,string,sys,osfromos.pathimportjoin# replace a string in multiple files#filesearch.pyiflen(sys.argv)<2:print"usage:%ssearch_text replace_text directory"%os.path.basename(sys.argv[0])sys.exit(0)stext=sys.argv[1]rtext=sys.argv[2]iflen(sys.argv)==4...
string,如果出错默认报一个 ValueError 的异常 , 除非 errors 指定的是 'ignore' 或者'replace' string.encode(encoding='UTF-8', errors='strict') 以 encoding 指定的编码格式编码 string,如果出错默认报一个ValueError 的异常,除非 errors 指定的是'ignore'或者'replace' string.endswith(obj,beg=0, end=len...
In this tutorial, you'll learn how to remove or replace a string or substring. You'll go from the basic string method .replace() all the way up to a multi-layer regex pattern using the sub() function from Python's re module.
Replace a Character in a String Using Slicing Method Slicing involves creating a new string by concatenating parts of the original string with the replacement character where needed. Example: text = "hello world" new_text = text[:2] + "x" + text[3:] print(new_text) # "hexlo world" ...
>>> str.replace('EAR','ear') #匹配替换 'string learn' >>> str.replace('n','N') 'striNg lEARN' >>> str.replace('n','N',1) 'striNg lEARn' >>> str.strip('n') #删除字符串首尾匹配的字符,通常用于默认删除回车符 'string lEAR' >>> str.lstrip('n') #左匹配 'string lEARn...
utf-8') as file:# 读取所有行for line in file:# 使用find寻找匹配if search_string in line:...