Read file as a list of tuples

Question

I want to read a text file using Python. My list must be like this:

mylist = [(-34.968398, -6.487265), (-34.969448, -6.488250),
          (-34.967364, -6.492370)         


        

Answer 1

Yes Cyber solution is best.

For beginners

1. Read file in Read mode.
2. Iterate lines by readlines() or readline()
3. Use split(",") method to split line by '
4. Use float to convert string value to float. OR We can use eval() also.
5. Use list append() method to append tuple to list.
6. Use try except to prevent code from break.

Code:

p = "/home/vivek/Desktop/test.txt"
result = []
with open(p, "rb") as fp:
    for i in fp.readlines():
        tmp = i.split(",")
        try:
            result.append((float(tmp[0]), float(tmp[1])))
            #result.append((eval(tmp[0]), eval(tmp[1])))
        except:pass

print result

Output:

$ python test.py 
[(-34.968398, -6.487265), (-34.969448, -6.48825), (-34.967364, -6.49237), (-34.965735, -6.582322)]

Note: A readline() reads a single line from the file.