This is a simple library for creating fixed-width text data files or text files (txt or csv) separated by a certain separator character.

You can use it to exchange data between APIS and other applications.

To install the package, just run the command below:

pip install pyFixedWidthDataFile

1. Instantiate the class:

from pyFixedWidthDataFile import FWDataFile app = FWDataFile(path_to_specs_folder, optional_separator)

• path_to_specs_folder: Path to the folder containing the Specs Files;
• optional_separator: Separation character between fields (optional)

2. Specs Files: Files, JSON standard, with specifications of the fields contained in the lines (records).

see example in tests/specs

Open the record with "{", enter the name clause, it is mandatory. Open the list of objects of type field with "fields {", enter the id of the field and enter the characteristics of the field.

• name: (required) name of the field
• start_pos: (required) starting position
• end_pos: (required) end position
• format: (required) field type, which can be:

1. alpha: alphanumeric, text
2. num: numeric (integer, floating point)

• default: (optional) default value of the field, if there is no default value the field will not be filled with spaces, even if it is numeric.
• decimals: (optional) only for numeric fields, number of decimal places
• ignore: (optional) field to be ignored
• required: (optional) mandatory field
• regex: (optional) regular expression operations field

3. Inject the lines from the file:

app.append_line("header",cod_client="1234",name_client="Alexandre Defendi")

4. use the result:

print(app)

"R000001PED1234 Alexandre Defendi X"

This project is under the MIT license. See the LICENSE file for more details.