Comapring two files - Printable Version +- Python Forum (https://python-forum.io) +-- Forum: Python Coding (https://python-forum.io/forum-7.html) +--- Forum: General Coding Help (https://python-forum.io/forum-8.html) +--- Thread: Comapring two files (/thread-21511.html) |
Comapring two files - usman88 - Oct-02-2019 Hi, i have 2 txt files which i want to compare. File 1 has only dates. File 2 has dates and some text. All i want to do is out put in File 3 is all dates of File 1 and text against those dates in file 2. can anyone help? RE: Comapring two files - micseydel - Oct-02-2019 What have you tried? We're happy to help you solve this yourself, but we get a lot of "do it for me"-looking posts even though we don't do people's work for them :) RE: Comapring two files - usman88 - Oct-03-2019 (Oct-02-2019, 09:39 PM)micseydel Wrote: What have you tried? We're happy to help you solve this yourself, but we get a lot of "do it for me"-looking posts even though we don't do people's work for them :) Hi, You are correct, so far what i did is i could open files and then use split to extract dates only. I cant figure our how to loop that for each line in file. I would be great if you could or anyone else could point me to topic i need to read on or some url. As i am new to python so surely have not much experience in it. RE: Comapring two files - burningkrome - Oct-03-2019 As a suggestion, look into Python's "re" module (regex). Then you could match line by line from both files. See here for more suggestions. Also here for how to iterate through a file. import re s1 = "2019-10-03 text in the source file" s2 = "2019-10-03 text from the file to be searched" matches = re.search("^(\d{4}-\d{1,2}-\d{1,2})(.*)$", s1) print(matches.group(1)) # Then use an if in if matches.group(1) in s2: matches = re.search("^(\d{4}-\d{1,2}-\d{1,2})(.*)$", s2) print(matches.group(2)) RE: Comapring two files - usman88 - Oct-03-2019 Hi thanks for reply. I used panda and numpy. IT works fine with small data but when i use my full file it does not work. There are some column issues there but data is over thousand of rows so cant filter where it is messing up/ RE: Comapring two files - burningkrome - Oct-03-2019 (Oct-03-2019, 01:58 PM)usman88 Wrote: Hi thanks for reply. Post your code so we can take a look :) RE: Comapring two files - usman88 - Oct-07-2019 hi sorry for late reply. i got that done this python and SQL. I would go for SQL as it helps me better for future purposes and data manipulation. RE: Comapring two files - wavic - Oct-07-2019 If the dates are formatted the same way in both files it's quite easy using dictionaries. Make from a second file a dictionary with the dates as a key and the text as a value. Then you can get the dates from the first file and use each of it as a key to the dictionary and print the item. If there is no such a key, no match. |