How to output numbers to each iteration in a for loop?

Question

for replay_data in raw_replay_data['data']['video_info']:
    target.write("Coordinates: " + replay_data['lat'] + (',') + replay_data['lnt'] + "\n")

This for loop gives me fx. the output of:

Coordinates: 0,0
Coordinates: 0,0
Coordinates: 0,0
Coordinates: 0,0

I would like a number after each "Coordinates" string that increases for each new coordinates available. How can I make it output:

Coordinates 1: 0,0
Coordinates 2: 0,0
Coordinates 3: 0,0
Coordinates 4: 0,0

If you've found an answer useful, please consider accepting it by clicking on the tick mark next to it, so that others may find it useful in the future :) — Ari Cooper-Davis
– Ari Cooper-Davis, Commented Jan 11, 2018 at 17:51

r.ook · Accepted Answer · 2018-01-10 16:19:53Z

4

Look up the enumerate() function, it's your best friend in for loops. Also you can use some str.format() function to make your output more readable:

for index, replay_data in enumerate(raw_replay_data['data']['video_info']):
    target.write("Coordinates {0}: {1}, {2}\n".format(index+1, replay_data['lat'], replay_data['lnt'])

answered Jan 10, 2018 at 16:19

r.ook

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Patrick Artner · Accepted Answer · 2018-01-10 15:58:23Z

1

You create a counter and count up:

numbr = 1   # counter, starting at 1
for replay_data in raw_replay_data['data']['video_info']:
    target.write("Coordinates " + str(numbr) + ": " + replay_data['lat'] + (',') + replay_data['lnt'] + "\n")
    numbr += 1 # increment counter

You might want to look into string format methods: string.format

You can do things like:

replay_data = {}
replay_data['lat'] = 1
replay_data['lnt'] = 2

numbr = 22

print("Coordinates {n}: {lat},{lng}\n"
      .format(n=numbr, lat = replay_data['lat'], lng = replay_data['lnt']))

Output:

Coordinates 22: 1,2

edited Jan 10, 2018 at 15:58

answered Jan 10, 2018 at 15:52

Patrick Artner

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