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writing a number variable to a file

4 replies on 1 page. Most recent reply: Dec 12, 2018 2:07 AM by Vijay Khatri

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not telling

Posts: 2
Nickname: ulrich200
Registered: Oct, 2008

writing a number variable to a file Posted: Oct 18, 2008 6:04 PM
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Hi I'm new to python and I'm trying to make a program to keep track of my money, but when it tries to write the number i get this message:

TypeError: unsupported operand type(s) for +: 'float' and 'str'

here is the script, can someone please help me?

moneyRead = open("my_money.txt", "r")
moneyWrite = open("my_money.txt", "w")
choice = 0
choice2 = 0
loop = 1
value = 0
value1 = 0
value2 = 0
value3 = 0

print " "
print "Welcome!"
print " "
print "To view the amount of money you have, type: 1"
print "To set the amount of money you have, type: 2"
print "To add or subtract to the amount of money you have, type: 3"
print "to quit, type: 4"
print " "
while loop == 1:
choice = input("What do you want to do?: ")
print " "

if choice == 1:
print moneyRead.readline()

if choice == 2:
value = input("How much money do you have?: ")
moneyWrite.write(value)

if choice == 3:
print "The current saved amount is " + moneyRead.readline()
print " "
print "To add to this amount, type: 1"
print "To subtract from this amount, type: 2"
choice2 = input("What do you want to do?: ")

if choice2 == 1:
value1 = moneyRead.readline()
value2 = input("how much do you want to add?: ")
value3 = value1 + value2
moneyWrite.write(value3)
if choice2 == 2:
value1 = moneyRead.readline()
value2 = input("how much do you want to subtract?: ")
value3 = value1 - value2
moneyWrite.write(value3 )

if choice == 4:
loop = 0


not telling

Posts: 2
Nickname: ulrich200
Registered: Oct, 2008

Re: writing a number variable to a file Posted: Oct 18, 2008 6:12 PM
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I messed up on the error message.

here's the real error message:

TypeError: argument 1 must be string or read-only character buffer, not float

ndoe ganteng

Posts: 3
Nickname: ndoe
Registered: Oct, 2008

Re: writing a number variable to a file Posted: Nov 3, 2008 9:22 AM
Reply to this message Reply
how to make a paragraph from file to file

like this e.g data.txt

i
want
eat
some
pizza
with
cappucino
in
kuta
bali



to this data2.txt

i want eat some pizza with cappucino in kuta bali

but without exchange the code i free change data.txt

e.g

i
want
eat
some
pizza
with
cappucino
in
kuta
bali
late
night

i want eat some pizza with cappucino in kuta bali late night

captain eddy

Posts: 4
Nickname: hemsbond
Registered: Oct, 2010

Re: writing a number variable to a file Posted: Nov 8, 2010 1:04 AM
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moneyRead = open("my_money.txt", "r")
moneyWrite = open("my_money.txt", "w")
choice = 0
choice2 = 0
loop = 1
value = 0
value1 = 0
value2 = 0
value3 = 0

print " "
print "Welcome!"
print " "
print "To view the amount of money you have, type: 1"
print "To set the amount of money you have, type: 2"
print "To add or subtract to the amount of money you have, type: 3"
print "to quit, type: 4"
print " "
while loop == 1:
choice = input("What do you want to do?: ")
print " "

if choice == 1:
print moneyRead.readline()

if choice == 2:
value = raw_input("How much money do you have?: ")
moneyWrite.write(value)

if choice == 3:
print "The current saved amount is " + moneyRead.readline()
print " "
print "To add to this amount, type: 1"
print "To subtract from this amount, type: 2"
choice2 = input("What do you want to do?: ")

if choice2 == 1:
value1 = moneyRead.readline()
value2 = raw_input("how much do you want to add?: ")
value3 = value1 + value2
moneyWrite.write(value3)
if choice2 == 2:
value1 = moneyRead.readline()
value2 = raw_input("how much do you want to subtract?: ")
value3 = value1 + value2
moneyWrite.write(value3 )

if choice == 4:
loop = 0

Vijay Khatri

Posts: 2
Nickname: vijay1994
Registered: Dec, 2018

Re: writing a number variable to a file Posted: Dec 12, 2018 2:07 AM
Reply to this message Reply
Any of these should work

outf.write("%s" % num)

outf.write(str(num))

print >> outf, num

To learn more: https://hackr.io/blog/10-best-python-books-for-beginners-and-advanced-programmers

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