Reputation: 233
I'm having trouble with list and string formatting, and writing the changes to a new file. What I'm looking for is:
Where both the preceding and following STRINGS are already defined, and everything is written to a new file!
My end goal, is so that when i import a txt file (containing a list) and run the code, it then is printed to a new file with pre-defined strings added before and after the imported txt file's list.
My code right now is as follows:
text_file = open(r"text_file path", "r")
lines = text_file.read().split(',')
lines.insert(0, "String Values Before")
lines.insert("String Values After")
text_file.close()
lines.write("new_file.txt", "w+")
The problem now is that I am inserting to the list, whereas I want the strings to be separate to the list!
I've been able to produce what I want the written file to look like in the console with this code here:
FIRMNAME = "apple"
FILETYPE = "apple"
REPLYFILENAME = "apple"
SECMASTER = "apple"
PROGRAMNAME = "apple"
text_file = open(r"textfile path", "r+")
lines = text_file.readlines().split('\n')
print(("START-OF-FILE \nFIRMNAME= ") + FIRMNAME)
print(("FILETYPE= ") + FILETYPE)
print(("REPLYFILENAME= ") + REPLYFILENAME)
print(("SECMASTER= ") + SECMASTER)
print(("PROGRAMNAME= ") + PROGRAMNAME)
print("START-OF-FIELDS")
print("END-OF-FIELDS")
print("START-OF-DATA")
pprint.pprint(lines)
print("END-OF-DATA")
print("END-OF-FILE")
I just can't figure out how to write this to a new file! Help!
Upvotes: 1
Views: 89
Reputation: 71451
You have an error you originally call the insert
method as you must provide an index; however, you can just append, join the resulting list, and write to the file:
text_file = open(r"text_file path", "r")
lines = text_file.read().split(',')
lines.insert(0, "String Values Before")
lines.append("String Values After")
text_file.close()
new_file = open('text_file_path.txt', 'w')
new_file.write(','.join(lines)+'\n')
new_file.close()
Upvotes: 0
Reputation: 3786
Use pformat
.
pprint
before_values = ["a", "b", "c"]
data = ["1", "2", "3"]
after_values = ["d", "e", "f"]
with open("outfile.txt", "w) as outfile:
outfile.write("\n".join(before_values)) # Write before values
outfile.write(pprint.pformat(data)) # Write data list
outfile.write("\n".join(after_values)) # Write after values
Upvotes: 1
Reputation: 3361
Your variable lines
is of type list
, which does not have a method write
.
Furthermore insert
requires a position, that your second call is lacking.
You'll need to read the file, concat it with the prefix and suffix values accordingly and then write it to the appropriate output file:
with open("text_file_path", "r") as input_file:
text = input_file.read()
text = '\n'.join(("String Values Before", text, "String Values After"))
with open("new_file.txt", "w+") as output_file:
output_file.write(text)
Upvotes: 1
Reputation: 1444
You could solve it this way:
newFile = 'your_new_file.txt'
oldFile = 'your_old_file.txt'
# Open the new text file
with open(newFile, 'w') as new_file:
# Open the old text file
with open(oldFile, 'r') as old_file:
# Write the line before the old content
new_file.write('Line before old content\n')
# Write old content
for line in old_file.readlines():
new_file.write(line)
# Write line after old content
new_file.write('Line after old content')
Upvotes: 2