Some Python Code Imrovement TIPS

PythonTips

TIP #1 : Check Membership Efficiently 


    lyrics_list = ['her', 'name', 'is', 'rio']
    
    # Avoid this
    words = make_wordlist() # Pretend this returns many words that we want to test
    for word in words:
        if word in lyrics_list: # Linear time
            print word, "is in the lyrics"
    
    # Do this
    lyrics_set = set(lyrics_list) # Linear time set construction
    words = make_wordlist() # Pretend this returns many words that we want to test
    for word in words:
        if word in lyrics_set: # Constant time
            print word, "is in the lyrics"
            
            
TIP #2 : USE List comprehension Properly 

   words = ['her', 'name', 'is', 'rio']
    letters = [letter for word in words
                      for letter in word]


TIP #3 :  Needing the index value in the loop 
        for index, value in enumerate(alist): 
            print index, value
            
TIP #4 : Needing to iterate over two loops at once, getting a value at the same index from each.
    for word, number in zip(words, numbers):
        print word, number
    
TIP #5 : Use xrange Instead Of range in case of Large List Iteration 
    This function is very similar to range(), but returns an xrange object instead of a list. 
    This is an opaque sequence type which yields the same values as the corresponding list,
    without actually storing them all simultaneously. The advantage of xrange() over range() is minimal (since xrange() 
    still has to create the values when asked for them) except when a very large range is used on a memory-starved machine 
    or when all of the range’s elements are never used