方法二:使用字符串的find()方法 另外一种判断方法是使用字符串的find()方法。该方法返回子串在字符串中的最低索引,如果不存在则返回-1。示例如下: deffind_character(string,character):returnstring.find(character)!=-1# 示例text="我爱编程"char_to_check="编"iffind_character(text,char_to_check):print(...
这段代码的输出结果将会是The character a is not present in the string,因为字符串'hello world'并不包含字符'a'。 方法二:使用find()方法 Python中的字符串类提供了一个find()方法,可以用于查找一个字符在字符串中的位置。如果找到了字符,则返回其在字符串中的索引值;如果找不到,则返回-1。可以通过以下方...
print ("initial_strings :", ini_string,"", ini_string2,"\ncharacter_to_find :", c) # Using find Method res1=ini_string.find(c) res2=ini_string2.find(c)ifres1 == -1: print ("No such charater available in string {}".format( ini_string))else: print ("Character {} in stri...
We’re not changing the underlying string that was assigned to it before. We’re assigning a whole new string with different content. In this case, it was pretty easy to find the index to change as there are few characters in the string.How are we supposed to know which character to ch...
string.center(length,character) #length:必需,所返回字符串的长度;character:可选,填补两侧缺失空间的字符,默认是“”(空格)。 #!/usr/bin/python #使用字母“o"作为填充字符 txt= "banana" x = txt.center(20,"o") print(x) #输出结果:ooooooobananaooooooo 11. casefold( ):返回一个字符串,其中所有字...
test="Python Programming"print("String: ",test)# First one character first_character=test[:1]print("First Character: ",first_character)# Last one character last_character=test[-1:]print("Last Character: ",last_character)# Everything except the first one character except_first=test[1:]print...
33. Find 5-letter Words Write a Python program to find all five-character words in a string. Sample Solution: Python Code: importre text='The quick brown fox jumps over the lazy dog.'print(re.findall(r"\b\w{5}\b",text))
Please enter a character A-Z:A Aispresentinthelist Copy Methods to Find a String in a List 1. Using theinOperator (Fastest for Membership Testing) Theinoperator is the most straightforward way to check if a string is present in a list. It is also the fastest method for membership testin...
string.strip(character)character: 要删除的字符集合[可选] 版本 rstrip(): 从字符串的右边移除字符。 lstrip(): 从字符串的左边移除字符。 10. zfill( ) zfill()方法会在字符串的开头添加零(0)。返回字符串的长度取决于提供的宽度。 语法string.zfill(width) width:指定返回字符串的长度。但是,如果宽度参数...
# 在双引号字符串中使用单引号 quote_in_string = "Python's syntax is clear." # 在单引号字符串中使用双引号 quote_in_string = 'He said, "Python is awesome."' 2.2 使用三引号 三引号(''' 或""")用于创建多行字符串,这在需要在字符串中保留格式时非常有用,如文档字符串(docstrings)或多行文本...