isdigit
时间: 2023-09-07 16:12:48 浏览: 47
isdigit是Python中的一个字符串方法,用于判断字符串是否只包含数字字符(0-9)。
例如,如果我们有一个字符串s,我们可以使用isdigit方法来判断它是否只包含数字字符:
```
s = '12345'
if s.isdigit():
print('s只包含数字字符')
else:
print('s不只包含数字字符')
```
输出:
```
s只包含数字字符
```
如果我们有一个字符串s包含其他字符,例如字母或符号:
```
s = '12345a'
if s.isdigit():
print('s只包含数字字符')
else:
print('s不只包含数字字符')
```
输出:
```
s不只包含数字字符
```
相关问题
isdigit函数
isdigit函数是一个C标准库函数,用于判断一个字符是否是数字字符。它的原型定义如下:
```c
int isdigit(int c);
```
其中,参数c为需要判断的字符,它的取值范围是0~255。如果c是数字字符,即'0'~'9'之间的字符,isdigit函数返回一个非零值(真);否则返回零(假)。例如:
```c
isdigit('1'); // 返回非零值
isdigit('a'); // 返回零
```
isdigit函数在处理字符时,会先将字符转换为对应的ASCII码值,然后判断该值是否在数字字符的ASCII码值范围内。因此,isdigit函数只能判断单个字符是否为数字字符,不能判断一个字符串是否全部由数字字符组成。
pandas isdigit
`isdigit()` is a method in Python's built-in `str` class that returns `True` if all characters in the string are digits and there is at least one character, otherwise it returns `False`.
However, `isdigit()` is not a method in the `pandas` library. `pandas` is a library for data manipulation and analysis, and it provides many methods for working with data frames and series. If you want to check if all values in a `pandas` series are digits, you can use the `str.isdigit()` method of the series object. For example:
``` python
import pandas as pd
# create a series with some values that are digits and some that are not
s = pd.Series(['123', '456', '789', 'abc', ''])
# use the str.isdigit() method to check if each value is a digit
digit_check = s.str.isdigit()
print(digit_check)
```
This will output:
```
0 True
1 True
2 True
3 False
4 False
dtype: bool
```
As you can see, `str.isdigit()` returns a boolean series indicating which values are digits and which are not.