On 2/21/2012 10:00 PM, Michael Lewis wrote:
Hi everyone,
I have some code where I import a file to use a module. That module
that I import
takes text and a multiplier, checks for any numbers in that text and
will then multiply those numbers by the given multiplier. The imported
module is below. I am getting the text from a file that I have which
starts out as:
.5 lb. butter
1.75 Cups Graham Cracker Crumbs
2.0 Cups Powder Sugar
1.0 Cups Peanut Butter
2.0 Cups Semi-sweet Chocolate Chips
It seems that the .isdigit() function that I use doesn't recognize the
.5 as a number and therefore doesn't multiply it. How can I get my
code to recognize numbers such as .5, 1.75 as numbers?
Wow - the requirements just changed. Up tilll now we were dealing with
multiplying each digit. Now we have to parse out a string that
represents a number with decimal places! I hope that we don't raise the
oven temperature in the process.
Is it true that the number to multiply is always at the beginning of a
line? If so that makes the job a lot easier.
Imported module:
def MultiplyText(text, multiplier):
'''Recieve a S & int. For digits in S, multiply by multiplier and
return updated S.'''
return ' '.join(str(float(num) * multiplier) if num.isdigit() else
num for num in text)
Module doing the importing/opening/reading/creating a new file
import Homework5_1 as multiply
def DoubleDigits(file_name):
'''Open file/read file/write new file that doubles all int's in the
read file'''
try:
read_file = open(file_name)
except IOError:
return 'No such file.'
new_file_name = file_name + '2'
try:
write_file = open(new_file_name, 'w')
except IOError:
read_file.close()
return 'No such file to write to.'
for line in read_file:
new_line = line.split()
new_line = ''.join(multiply.MultiplyText(new_line, 2))
write_file.write(new_line + '\n')
read_file.close()
write_file.close()
def main():
DoubleDigits(raw_input('What file do you want to open? '))
if '__name__' == '__main__':
print main()
Output that is written to my file:
Peanut Butter Bars
Ingredients
.5 lb. butter
1.75 Cups Graham Cracker Crumbs
4.0 Cups Powder Sugar
2.0 Cups Peanut Butter
4.0 Cups Semi-sweet Chocolate Chips
Melt butter. Add graham cracker crumbs,
peanut butter and sugar. Mix well and
pat into sheet pan. Cover with melted
chocolate. Refrigerate until semi-firm,
then cut into squares.
--
Michael J. Lewis
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--
Bob Gailer
919-636-4239
Chapel Hill NC
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