Practical Data Wrangling

Specifying the filenames from the Terminal

1. Import the sys module:

import jsonimport sysinFile = open("data/input_data.json",'r')scf_data = json.load(inFile)...

2. Change the input filename to sys.argv[1] and output filename to sys.argv[2]:

import jsonimport sysinFile = open(sys.argv[1],'r')scf_data = json.load(inFile)......outfile = open(sys.argv[2],"w")json.dump(new_data, outfile, indent=4)outfile.close()

3. Run the program followed by the input file and output file paths. This is for Windows:

$ python process_data.py data\\scf_data1.json data\\scf_output_data2.json

This is for macOS and Linux:

$ python process_data.py data/scf_data1.json data/scf_output_data2.json