str.lower() takes no arguments (1 given)是什么错误
时间: 2023-12-30 20:03:52 浏览: 127
这个错误通常意味着你使用了错误的方法调用。在Python中,`str.lower()`方法不接受任何参数,它将字符串中的所有大写字母转换为小写字母。
如果你想将一个字符串变成小写并将其存储到一个新变量或替换原变量,则应该这样写:
```
my_str = "HELLO WORLD"
lower_str = my_str.lower()
print(lower_str) # 输出:hello world
```
如果你想将一个字符串中的某些部分变成小写,你需要使用字符串的切片和`str.lower()`方法:
```
my_str = "HeLLo WoRLd"
new_str = my_str[:4].lower() + my_str[4:].upper()
print(new_str) # 输出:hello WORLD
```
在这个例子中,我们使用切片将第一个字母到第四个字母转换为小写,将其余的字母转换为大写,并将它们拼接在一起。
相关问题
str.lower() takes no arguments (1 given)
This error message usually occurs when you try to pass an argument to the `str.lower()` method. The `str.lower()` method does not take any arguments, so passing an argument will result in a TypeError.
For example, if you have a string variable `s` and you want to convert it to lowercase, you should call `s.lower()` without passing any arguments.
Here's an example of how to use the `str.lower()` method properly:
```
s = "Hello, World!"
lower_s = s.lower() # This will convert the string to lowercase
print(lower_s) # Output: hello, world!
```
If you still encounter this error message, please provide more information about your code and the specific error message you are seeing.
str.upper() takes no arguments (1 given)
This error message occurs when you try to pass an argument to the `str.upper()` method, but the method does not accept any arguments.
For example:
```
string = "hello"
string.upper("world")
```
In this case, you are trying to pass the string "world" as an argument to the `upper()` method, but it does not accept any arguments. To fix this error, simply remove the argument:
```
string = "hello"
string.upper()
```
Now the `upper()` method will work correctly and return the string "HELLO".
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