how to do string formatting in python for this specific example

Question

pair = ['BTC/USD', 'ETH/BTC', 'ETH/USD']
time_from = 20200101
time_to = 20200120

considering the above list and variables

I want to execute the following cmd using os module.

cmd = ("freqtrade download-data -d /home/datarepo -p 'BTC/USD' 'ETH/BTC' 'ETH/USD' -t 1h --timerange 20200101-20200101 --exchange bittrex -vv")

When I do string format with "' '".join I could able to generate cmd like the below example which is not correct cmd.

cmd = ("freqtrade download-data -d /home/datarepo -p "BTC/USD' 'ETH/BTC' 'ETH/USD" -t 1h --timerange '20200101-20200101' --exchange bittrex -vv")

Any suggestions would be appreciated. Thank you

Orozco · Accepted Answer · 2021-01-21T14:46:49.700

1

You could use something like this:

pair = ['BTC/USD', 'ETH/BTC', 'ABC/DEF']
time_from = 20200101
time_to = 20200120

message = "'" + "' '".join(pair) + "'"

cmd = "freqtrade download-data -d /home/datarepo -p %pair% -t 1h --timerange '%time_to%-%time_from%' --exchange bittrex -vv"

cmd = cmd.replace('%pair%', message).replace('%time_to%', str(time_to)).replace('%time_from%', str(time_from))

print(cmd)
# "freqtrade download-data -d /home/datarepo -p 'BTC/USD' 'ETH/BTC' 'ABC/DEF' -t 1h --timerange '20200120-20200101' --exchange bittrex -vv"

edited Jan 21 '21 at 14:46

answered Jan 21 '21 at 13:34

Orozco

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2
8

I have updated the details, please have a look. That is what i exactly needed.Thank you – ANK Jan 21 '21 at 14:19
just updated my answer for the new question – Orozco Jan 21 '21 at 14:48
could you please mark the post as the answer of the question? – Orozco Jan 22 '21 at 18:58

how to do string formatting in python for this specific example

1 Answers1