Python: Searching text for Strings from one List and replacing them with Strings from another

Question

I'm trying to create a program to do very simple encryption/compression.

Basically, the program requests input in the form of a sentence which is split into words, e.g.

this is the gamma

I then have two lists:

mylist1 = ("alpha","beta","gamma","delta")
mylist2 = ("1","2","3","4")

Each word is matched against a list which contains a number of words. if the words are present in the list then it should replace the word with the corresponding number in the other list. The output should be:

this is the 3

Here is the code I have so far:

text = input("type your sentence \n")
words = text.split(" ")

mylist1 = ("alpha","beta","gamma","delta")
mylist2 = ("1","2","3","4")

#I was looking at zipping the lists together but wasn't sure I was on the right track
#ziplist = zip(mylist1, mylist2) 

for word in words:
    if word in mylist1:
    text = text.replace(word,mylist2[])

print (text)

This question that I was looking into yesterday shows how to do this using a dictionary but I encountered a problem when trying to convert the text file back from numbers to words again. (I swapped the Keys and Values around. I'm pretty certain I shouldn't do that)

Any input would be fantastic.

BrandonNash · Accepted Answer · 2015-11-24 17:34:09Z

2

You need to get the index of word from mylist1 and replace the occurrence of word in the variable text with the element at that same index in mylist2

text = text.replace(word, mylist2[mylist1.index(word)])

answered Nov 24, 2015 at 17:34

BrandonNash

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1 Comment

mjolnir Over a year ago

Index!, doh. I couldn't figure out how to link them. You can tell i'm still learning. You are a bit of a legend. Thanks.

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