Python string is determined whether the digital

Examples Python3

The following example by creating a custom functionis_number () method to determine whether the string of numbers:

# -*- coding: UTF-8 -*-

# Filename : test.py
# author by : www.w3big.com

def is_number(s):
    try:
        float(s)
        return True
    except ValueError:
        pass

    try:
        import unicodedata
        unicodedata.numeric(s)
        return True
    except (TypeError, ValueError):
        pass

    return False

# 测试字符串和数字
print(is_number('foo'))   # False
print(is_number('1'))     # True
print(is_number('1.3'))   # True
print(is_number('-1.37')) # True
print(is_number('1e3'))   # True

# 中文数字
print(is_number('四')) # False
# 版权号
print(is_number('©'))  # False

We can also use the embedded if statement to achieve:

Execute the above code output results:

False
True
True
True
True
False
False
False
False

More ways

Python isdigit () whether or not to detect a string consisting of only numbers.

Python IsNumeric () whether or not to detect a string consisting of only numbers. This method is only for unicode object.

Examples Python3