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Need help writing a regular expression:<br />
<br />
I need a regexp to match a URL, so I need to include all URLs that have a 'hello' in them and exclude all URLs that have 'bye' in them, in other words,<br />
need a regexp that matches .*hello.* but does not match .*bye.*<br />
<br />
NOTE: I replaced the super-secret &nbsp;words with 'hello' and 'bye' ;) <br />
I promise this is not a homework, I just suck with Regular Expressions and could not find online the exclude pattern<br />
Thanks!
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Need help writing a regular expression:

I need a regexp to match a URL, so I need to include all URLs that have a 'hello' in them and exclude all URLs that have 'bye' in them, in other words,
need a regexp that matches .*hello.* but does not match .*bye.*

NOTE: I replaced the super-secret  words with 'hello' and 'bye' ;) 
I promise this is not a homework, I just suck with Regular Expressions and could not find online the exclude pattern
Thanks!

Phyton Regular Expression help, pls

Python is a widely used general-purpose, high-level programming language. Its design philosophy emphasizes code readability, and its syntax allows programmers to express concepts in fewer lines of code than would be possible in other languages. Python supports multiple programming paradigms, including object-oriented, imperative and functional programming or procedural styles. It features a dynamic type system and automatic memory management and has a large and comprehensive set of standard libraries, including NumPy, SciPy, Django, PyQuery, and PyLibrary.

Python

A regular expression ("regex") is a sequence of characters that define a search pattern, mainly for use in pattern matching with strings, or string matching, i.e. "find and replace"-like operations. Regular expression processors are found in several search engines, search and replace dialogs of several word processors and text editors, and in the command lines of text processing utilities, such as sed and AWK. Many programming languages provide regular expression capabilities, some built-in, for example Perl, JavaScript, Ruby, AWK, and Tcl, and others via a standard library, for example .NET languages, Java, Python and C++ (since C++11). Most other languages offer regular expressions via a library.