CODEWITHSUNDEEP
python
Robert Schneeberger
Robert Schneeberger

Reputation: 1

Python functions and strings

How would i use a function to grab specific parts of a string?
Say for instance my string consisted of data such as the following: '12345678 123456.78 Doe, John D.' # Data that could be representative of bank software# How do i tell python to make the first chars of the string an int, the second part of the string to be a float and the last part should automatically remain a string right?

for line in file_obj:
    print(line) #would yield something like this '12345678 123456.78 Doe, John D.'

If i had functions like:

def find_balance():
    return float  

def find_acc_num():
    return int
def find_name():
    return str

What would my parameters be? Would for iteration be the best way to solve the problem? I want to be able to change account information (balances and names) as long as the user can supply the correct account number. I am new to using functions and am a bit unsure how to go about doing this...

Thanks in advance for any help i really appreciate it. =D

Upvotes: 0

Views: 104

Answers (2)

Trevor Merrifield
Trevor Merrifield

Reputation: 4691

Probably homework but I am bored

for line in file_obj:
    #Make a list of parts separated by spaces and new lines
    #The second argument says to only split up the first two things
    parts = line.split(None, 2)
    #Assign each value
    theint = int(parts[0])
    thefloat = float(parts[1])
    thestring = parts[3].strip()

You could do this in multiple functions by passing each function the parts if you wanted.

Edit: Changed code to use max length at suggestion of @arshajii . Also stripped the newline at the end of thestring.

Upvotes: 1

arshajii
arshajii

Reputation: 129477

You can use str.split() with a maxsplit of 2:

>>> s = '12345678 123456.78 Doe, John D.'
>>> 
>>> v = s.split(None, 2)
>>> int(v[0]), float(v[1]), v[2]
(12345678, 123456.78, 'Doe, John D.')

Upvotes: 5

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