Programming in Python

Comments

• bubbatremell

  March 2009

  reading in the file will depend on what format the data is in. If the data is in comma separted value format, you should check out the csv module. Otherwise, you can do something like:
  my_file = open('file_name')
  my_file will be a generator, so you will be able to get the next line in the file with
  line = my_file.next()
  you can also put this in a for loop:
  for line in my_file:
  #do stuff to each line
  
  from there, I believe my_file.next() will return a string, so you can do something like:
  output_dict = {}
  for line in my_file.next():
  output_dict.update(e.split())
  #that only works if e.split() returns 2 elements (ie, there are 2 elements on
  #a line. If there are more than 2 per line, consider storing e.split() and
  #munging the results into something useful
  
  Good luck!
  
• bubbatremell

  March 2009

  Update, I totally missed the data sample you posted. It would be convenient store the second part as a list, so you have dict like
  { name: [food list] }
  
  This will require you to mess with the input from my_file.next(). Maybe this:
  out_dict = {}
  a = my_file.next().split() # split on spaces
  b = a[0] # first el is the name
  # second el is the dash
  c = a[2:] # slice the list so everything else goes is food
  out_dict.update([b,c])
  #or
  out_dict[b] = c
  
  
• utpalendu

  April 2010

  #!/usr/bin/env python
  import string
  my_file=open('test.txt')
  my_dict={}
  
  for eachline in my_file.readlines():
  #eachline=[w for w in re.sub(';','',eachline)]
  eachline=string.replace(eachline,';','')
  eachline=string.replace(eachline,',','')
  print eachline
  key=eachline.split()[0]
  #print key
  value=eachline.split()[2:]
  #print value
  my_dict[key]=value
  #my_dict.update([key,value])
  print my_dict