But first, a very important note here. The string that we manipulate using the Python built-in >methods does NOT change the value of the string itself. 例子: text = "Please convert me to all uppercase" print(text.upper()) # output: PLEASE CONVERT ME TO ALL UPPERCASE ## 函数 print(...
Example 2: Change string case – if string is in uppercase, convert it to lowercase and if it is in lowercase convert it to uppercase. 示例2:更改字符串大小写–如果字符串为大写,则将其转换为小写,如果为小写,则将其转换为大写。 There is a string, we have to change its case, if string ...
But first, a very important note here. The string that we manipulate using the Python built-in >methods does NOT change the value of the string itself. 例子: text = "Please convert me to all uppercase" print(text.upper()) # output: PLEASE CONVERT ME TO ALL UPPERCASE ## 函数 print(...
A string containing all the characters that are considered uppercase letters. On most systems this is the string 'ABCDEFGHIJKLMNOPQRSTUVWX YZ'. Do not change its definition — the effect on the routines lower() and swapcase() is undefined. The specific value is locale-dependent, and will be ...
八、string模块常用字符串常量 # 使用常量需要import >>> import string as str # 生成所有小写字母 >>> str.ascii_lowercase 'abcdefghijklmnopqrstuvwxyz' # 生成所有大写字母 >>> str.ascii_uppercase 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' # 小写字母和大写字母 >>> str.ascii_letters 'abcdefghijklmnopqrstuvwxyzABC...
change= input("Switch to {} y/n:".format(thirDoor))#如果change='y'则finalDoorNum = thirDoor,否则finalDoorNum = firstDoorNumfinalDoorNum = thirDoorifchange=='y'elsefirstDoorNumifdoors[finalDoorNum] =='goat':return"I Win !"else:return"You Win !"whileTrue:print("="*30)print(StartGa...
1 def file_initial_upper(input_file, output_file): 2 '''Change all words to uppercase 3 input_file: string, input file path. 4 output_file: string, output file path. 5 ''' 6 with open(input_file, 'r') as fpi, open(output_file, 'a') as fpo: ...
Then we used the bracket operators to get the first four characters. We used [:4] to indicate that we want four characters from the beginning of the string. This is the same as using [0:4]. Next, we used the replace function to change the “o” character to the “0” character. ...
Write a Python program to convert all the characters into uppercase and lowercase and eliminate duplicate letters from a given sequence. Use the map() function. Sample Solution: Python Code : # Define a function named change_cases that converts a character to its upper and lower casesdefchange...
return: """ if not random_code_pool: code_pool = string.ascii_uppercase + string.digits random_code_pool = [] for i in range(num): s = '' for _ in range(length): s += random.choice(code_pool) if s and s not in random_code_pool: random_code_pool.append(s) # 写入方法。