how to rename a file and keep the original

-2

I would like to keep unaltered the template.txt file after I insert some text into it and save the altered text file with a new name. Currently, my code overwrites the template.txt.

f = open("template.txt", "r")

contents = f.readlines()

f.close()

#insert the new text at line = 2

contents.insert(2, "This is a custom inserted line n")

#open the file again and write the contents

f = open("template.txt", "w")

contents = "".join(contents)

f.write(contents)

f.close()

os.rename('template.txt', 'new_file.txt')

asked Nov 22 '18 at 17:58

alexv

465

3

Write to a new file (ie: new_file.txt) directly instead?

– Jon Clements♦
Nov 22 '18 at 17:59

2

change f = open("template.txt", "w") to sth like f = open("template_new.txt", "w") and remove os.rename since your new content will be saved in template_new.txt so you dont need to rename any file.

– Filip Młynarski
Nov 22 '18 at 18:01

thanks @FilipMłynarski

– alexv
Nov 22 '18 at 18:39

The trivial name for renaming a file while keeping the original is "copying".

– Klaus D.
Nov 22 '18 at 19:14

add a comment |

-2

I would like to keep unaltered the template.txt file after I insert some text into it and save the altered text file with a new name. Currently, my code overwrites the template.txt.

f = open("template.txt", "r")

contents = f.readlines()

f.close()

#insert the new text at line = 2

contents.insert(2, "This is a custom inserted line n")

#open the file again and write the contents

f = open("template.txt", "w")

contents = "".join(contents)

f.write(contents)

f.close()

os.rename('template.txt', 'new_file.txt')

asked Nov 22 '18 at 17:58

alexv

465

3

Write to a new file (ie: new_file.txt) directly instead?

– Jon Clements♦
Nov 22 '18 at 17:59

2

change f = open("template.txt", "w") to sth like f = open("template_new.txt", "w") and remove os.rename since your new content will be saved in template_new.txt so you dont need to rename any file.

– Filip Młynarski
Nov 22 '18 at 18:01

thanks @FilipMłynarski

– alexv
Nov 22 '18 at 18:39

The trivial name for renaming a file while keeping the original is "copying".

– Klaus D.
Nov 22 '18 at 19:14

add a comment |

-2

I would like to keep unaltered the template.txt file after I insert some text into it and save the altered text file with a new name. Currently, my code overwrites the template.txt.

f = open("template.txt", "r")

contents = f.readlines()

f.close()

#insert the new text at line = 2

contents.insert(2, "This is a custom inserted line n")

#open the file again and write the contents

f = open("template.txt", "w")

contents = "".join(contents)

f.write(contents)

f.close()

os.rename('template.txt', 'new_file.txt')

asked Nov 22 '18 at 17:58

alexv

465

I would like to keep unaltered the template.txt file after I insert some text into it and save the altered text file with a new name. Currently, my code overwrites the template.txt.

f = open("template.txt", "r")

contents = f.readlines()

f.close()

#insert the new text at line = 2

contents.insert(2, "This is a custom inserted line n")

#open the file again and write the contents

f = open("template.txt", "w")

contents = "".join(contents)

f.write(contents)

f.close()

os.rename('template.txt', 'new_file.txt')

python rename

asked Nov 22 '18 at 17:58

alexv

465

asked Nov 22 '18 at 17:58

alexv

465

asked Nov 22 '18 at 17:58

alexv

465

asked Nov 22 '18 at 17:58

alexv

465

asked Nov 22 '18 at 17:58

alexv

465

3

Write to a new file (ie: new_file.txt) directly instead?

– Jon Clements♦
Nov 22 '18 at 17:59

2

change f = open("template.txt", "w") to sth like f = open("template_new.txt", "w") and remove os.rename since your new content will be saved in template_new.txt so you dont need to rename any file.

– Filip Młynarski
Nov 22 '18 at 18:01

thanks @FilipMłynarski

– alexv
Nov 22 '18 at 18:39

The trivial name for renaming a file while keeping the original is "copying".

– Klaus D.
Nov 22 '18 at 19:14

add a comment |

3

Write to a new file (ie: new_file.txt) directly instead?

– Jon Clements♦
Nov 22 '18 at 17:59

2

change f = open("template.txt", "w") to sth like f = open("template_new.txt", "w") and remove os.rename since your new content will be saved in template_new.txt so you dont need to rename any file.

– Filip Młynarski
Nov 22 '18 at 18:01

thanks @FilipMłynarski

– alexv
Nov 22 '18 at 18:39

The trivial name for renaming a file while keeping the original is "copying".

– Klaus D.
Nov 22 '18 at 19:14

Write to a new file (ie: new_file.txt) directly instead?

– Jon Clements♦
Nov 22 '18 at 17:59

change f = open("template.txt", "w") to sth like f = open("template_new.txt", "w") and remove os.rename since your new content will be saved in template_new.txt so you dont need to rename any file.

– Filip Młynarski
Nov 22 '18 at 18:01

thanks @FilipMłynarski

– alexv
Nov 22 '18 at 18:39

The trivial name for renaming a file while keeping the original is "copying".

– Klaus D.
Nov 22 '18 at 19:14

add a comment |

1 Answer
1

active

oldest

votes

As people have mentioned, you're going to want to copy the contents of template.txt into a new file and then edit this new file. This allows you to keep the original file unmodified and you don't have to worry about renaming files at the end. Another tip: the with open(file) as f syntax keeps you from having to remember to close files when you're editing them and is the recommended way of working with files in python

with open("template.txt") as f:

    lines = f.readlines()

    with open("new_file.txt", "w+") as n:

        lines.insert(2, "This is a custom inserted line n")

        n.writelines(lines)

answered Nov 22 '18 at 18:36

NMerkl

414

The string that I insert is in the format: string_1="hello Bob", string_2="hello Mary", etc. How can create a for loop and concatenate the iterator to pick up every time a different string? E.g., for i in range(1,5,1): blah blah lines.insert(2,string_$in)

– alexv
Nov 22 '18 at 23:11

add a comment |

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1 Answer
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1 Answer
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active

oldest

votes

with open("template.txt") as f:

    lines = f.readlines()

    with open("new_file.txt", "w+") as n:

        lines.insert(2, "This is a custom inserted line n")

        n.writelines(lines)

answered Nov 22 '18 at 18:36

NMerkl

414

The string that I insert is in the format: string_1="hello Bob", string_2="hello Mary", etc. How can create a for loop and concatenate the iterator to pick up every time a different string? E.g., for i in range(1,5,1): blah blah lines.insert(2,string_$in)

– alexv
Nov 22 '18 at 23:11

add a comment |

with open("template.txt") as f:

    lines = f.readlines()

    with open("new_file.txt", "w+") as n:

        lines.insert(2, "This is a custom inserted line n")

        n.writelines(lines)

answered Nov 22 '18 at 18:36

NMerkl

414

The string that I insert is in the format: string_1="hello Bob", string_2="hello Mary", etc. How can create a for loop and concatenate the iterator to pick up every time a different string? E.g., for i in range(1,5,1): blah blah lines.insert(2,string_$in)

– alexv
Nov 22 '18 at 23:11

add a comment |

with open("template.txt") as f:

    lines = f.readlines()

    with open("new_file.txt", "w+") as n:

        lines.insert(2, "This is a custom inserted line n")

        n.writelines(lines)

answered Nov 22 '18 at 18:36

NMerkl

414

with open("template.txt") as f:

    lines = f.readlines()

    with open("new_file.txt", "w+") as n:

        lines.insert(2, "This is a custom inserted line n")

        n.writelines(lines)

answered Nov 22 '18 at 18:36

NMerkl

414

answered Nov 22 '18 at 18:36

NMerkl

414

answered Nov 22 '18 at 18:36

NMerkl

414

answered Nov 22 '18 at 18:36

NMerkl

414

The string that I insert is in the format: string_1="hello Bob", string_2="hello Mary", etc. How can create a for loop and concatenate the iterator to pick up every time a different string? E.g., for i in range(1,5,1): blah blah lines.insert(2,string_$in)

– alexv
Nov 22 '18 at 23:11

add a comment |

The string that I insert is in the format: string_1="hello Bob", string_2="hello Mary", etc. How can create a for loop and concatenate the iterator to pick up every time a different string? E.g., for i in range(1,5,1): blah blah lines.insert(2,string_$in)

– alexv
Nov 22 '18 at 23:11

The string that I insert is in the format: string_1="hello Bob", string_2="hello Mary", etc. How can create a for loop and concatenate the iterator to pick up every time a different string? E.g., for i in range(1,5,1): blah blah lines.insert(2,string_$in)

– alexv
Nov 22 '18 at 23:11

add a comment |

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