Python regex to find sequences of one upper case letter followed by lower case letters

Write a Python Program to find sequences of one upper case letter followed by lower case letters. If found, print ‘Yes’, otherwise ‘No’.

Examples:

Input : Geeks
Output : Yes

Input : geeksforgeeks
Output : No

Approach: Using re.search()

To check if the sequence of one upper case letter followed by lower case letters we use regular expression ‘[A-Z]+[a-z]+$‘.

# Python3 code to find sequences of one upper 
# case letter followed by lower case letters 
import re 
  
# Function to match the string 
def match(text): 
          
        # regex 
        pattern = '[A-Z]+[a-z]+$'
          
        # searching pattern 
        if re.search(pattern, text): 
                return('Yes') 
        else: 
                return('No') 
  
# Driver Function 
print(match("Geeks")) 
print(match("geeksforGeeks")) 
print(match("geeks")) 

Output:

Yes
Yes
No

My Personal Notes

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Smitha Dinesh Semwal

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