从字符串中删除多个字符（组成一个单词）

Question

I have a challenge which I have tried to solve using split.strings but that seems to not be designed for immutable strings the way I need but mainly for whitespace and single character removal. I have also tried regex but as they are not due in my current python course for a few weeks I am a bit stuck on how they work (although I know the basics of what they are for).

So, I have a JSON file that presents machine and people data from a factory and I need to parse the machine data separate from the people data that is gathered within the facility. Converting the JSON file and selecting the required data is working but within one of the parameters called name is a mix of people and machine info I need to separate out. An example of two branches is below:

"id": "b4994c877c9c",
    "name": "forklift_0001", # here is the machine
    "areaId": "Tracking001",
    "areaName": "Ajoneuvo",
    "color": "#FF0000",
    "coordinateSystemId": "CoordSys001",
    "coordinateSystemName": null,
    "covarianceMatrix": [

"id": "b4994c879275",
    "name": "guest_0001", # here is a person
    "areaId": "Tracking001_2D",
    "areaName": "staff1",
    "color": "#CCFF66",
    "coordinateSystemId": "CoordSys001",
    "coordinateSystemName": null,
    "covarianceMatrix": [

The code I have to convert is below:

for f in file_list:
    print('Input file: ' + f) # Replace with desired operations

with open(f, 'r') as f:

    distros = json.load(f)
    output_file = 'Output' + str(output_nr) + '.csv'

    with open(output_file, 'w') as text_file:
        for distro in distros:
            print(distro['name'] + ',' + str(distro['positionTS']) + ',' + str(distro['position']), file=text_file)

So what I need to do within the distro['name'] array (is it an array??) is to go through the 500k lines and ask it to remove anything that isn't forklift, crane, machine, etc, leaving only them (and later the opposite) and this I cannot figure out.

All help sincerely appreciated.

Answer 1

As I understand your question you want to give each entry a flag 'machine' or 'person', based on the "name" tag.

Assigning such a flag (or just directly writing to the appropriate file) could be done with for instance something like

with open(file1, 'w') as _file1, open(file2, 'w') as _file2, open(file3, 'w') as _file3:
    for distro in distros:
        yourstring = distro['name'] + ',' + str(distro['positionTS']) + ',' + str(distro['position'])

        if distro['name'].startswith(('forklift','crane',...)):
            _file1.write(yourstring)
        elif distro['name'].startswith(('guest','employee',...)):
            _file2.write(yourstring)
        else:
            _file3.write(yourstring)

The three files that have been opened for writing together will contain all the entries in the end, split up between machines, people, and neither of both.

Does that solve your issue?