python regex problem

English Programming/Scripting
1

Hello,

In a text I have to find a word with this pattern :

one lowercase character then three capitalized characters then one lowercase, three capitalized and one lowercase.

I tried this one : ‘[a-z][A-Z]+[A-Z]+[A-Z]+[a-z]+[A-Z]+[A-Z]+[A-Z][a-z]’
But that don’t work.

Can any give me a hint ?

Roelof

2

You seem to misunderstand the meaning of +. When you have understood, note that the + is greedy, it will swallow as many characters that match, so what you really want is:

[a-z][A-Z][A-Z][A-Z][a-z][A-Z][A-Z][A-Z][a-z]

or more succinctly

[a-z][A-Z]{3}[a-z][A-Z]{3}[a-z]

You might be interested in this site:

Python Regex Tool

3

oke,

Thank you.
It works but not perfect.

I try to solve this puzzle (re)
I get a hint that there are 10 “words” that match.
I get now only one.

So i have to puzzle how to solve that ?

Roelof

4

oke,

found the problem.
I have this code :


import re

challenge = open('challenge2.txt')
regel = challenge.read()
uitkomst = re.search('[a-z][A-Z]{3}[a-z][A-Z]{3}[a-z]', regel)
print uitkomst.group()

It’s only find the first occurence.

Anyone a tip how I can make it find and display everything

5

Wouldnt that the

regex.findall(string)

like it is to seen in the “Python Regex Tool” (Thanks for the Link, Keny-Yap :slight_smile: )

(Because here it finds all occurences of the matching words according to your pattern)

6

Hello,

Your right.

regex.findall did the trick of finding all the words.

Thanks all for the help.

Now trying to solve a pickle problem.

Roelof