How to get only number from string in Python?

We can use some methods to get the only number from a string.

 

• int
• join
• filter
• str.isdigit

Use the following code and get integer value from string

views = '100 views'
views = int(''.join(filter(str.isdigit, views)))
print(views)

Output: 100

views = ''
views = int(''.join(filter(str.isdigit, views)))
print(views)

Throw an exception as below.

Traceback (most recent call last):

  File "<input>", line 2, in <module>

ValueError: invalid literal for int() with base 10: ''

But is string have no number above code will throw an exception, so in this case we can use try-except to handle exception as bellow 

views = '100 views'

try:                
    views = int(''.join(filter(str.isdigit, views)))
except:
    views = 0

print(views)

Output : 100

views = ''

try:                
    views = int(''.join(filter(str.isdigit, views)))
except:
    views = 0

print(views)

Output : 0