How to read and store values from a text file into a dictionary. [python]
Solution 1
For a txt
file like so
453 Sperving_Bearing 9900
1342 Panametric_Fan 23400
9480 Converter_Exchange 93859
You can just do
>>> newDict = {}
>>> with open('testFile.txt', 'r') as f:
for line in f:
splitLine = line.split()
newDict[int(splitLine[0])] = ",".join(splitLine[1:])
>>> newDict
{9480: 'Converter_Exchange,93859', 453: 'Sperving_Bearing,9900', 1342: 'Panametric_Fan,23400'}
You can get rid of the ----...
line by just checking if line.startswith('-----')
.
EDIT - If you are sure that the first two lines contain the same stuff, then you can just do
>>> testDict = {"Part no.": "Description,Price"}
>>> with open('testFile.txt', 'r') as f:
_ = next(f)
_ = next(f)
for line in f:
splitLine = line.split()
testDict[int(splitLine[0])] = ",".join(splitLine[1:])
>>> testDict
{9480: 'Converter_Exchange,93859', 'Part no.': 'Description,Price', 453: 'Sperving_Bearing,9900', 1342: 'Panametric_Fan,23400'}
This adds the first line to the testDict
in the code and skips the first two lines and then continues on as normal.
Solution 2
You can read a file into a list of lines like this:
lines = thetextfile.readlines()
You can split a single line by spaces using:
items = somestring.split()
Here's a principial example how to store a list into a dictionary:
>>>mylist = [1, 2, 3]
>>>mydict = {}
>>>mydict['hello'] = mylist
>>>mydict['world'] = [4,5,6]
>>>print(mydict)
Containers like a tuple, list and dictionary can be nested into each other as their items.
To itereate a list you have to use a for statement like this:
for item in somelist:
# do something with the item like printing it
print item
Harry Harry
Updated on July 24, 2020Comments
-
Harry Harry over 3 years
I'm trying to figure out how to open up a file and then store it's contents into a dictionary using the Part no. as the key and the other information as the value. So I want it to look something like this:
{Part no.: "Description,Price", 453: "Sperving_Bearing,9900", 1342: "Panametric_Fan,23400",9480: "Converter_Exchange,93859"}
I was able to store the text from the file into a list, but I'm not sure how to assign more than one value to a key. I'm trying to do this without importing any modules. I've been using the basic str methods, list methods and dict methods.