extract element from list to form a 2-d array in Python
Question
Here is the data I have:
[('600855+600860', 0.17285466741397107), ('600841+600984', 0.22412665503906901), ('600860+600984', 0.32286764496195208), ('600815+600841', 0.33635550553792876), ('600841+600860', 0.39050910738491346), ('600815+600860', 0.40568508088748162), ('600841+600855', 0.41509110502628777), ('600855+600984', 0.44548966249191208), ('600815+600855', 0.46775374453232454), ('600815+600984', 0.59956672168742298)]
I want to extract, say element like'600855+600860' to form a 2d array in this way:
[[600855,600860], [600841,600984]......]
How to do it? Thanks.
4 answers
solution1
2 2015-07-01 05:28:37
You may try this,
>>> l = [('600855+600860', 0.17285466741397107), ('600841+600984', 0.22412665503906901), ('600860+600984', 0.32286764496195208), ('600815+600841', 0.33635550553792876), ('600841+600860', 0.39050910738491346), ('600815+600860', 0.40568508088748162), ('600841+600855', 0.41509110502628777), ('600855+600984', 0.44548966249191208), ('600815+600855', 0.46775374453232454), ('600815+600984', 0.59956672168742298)]
>>> [list(map(int,i[0].split('+'))) for i in l]
[[600855, 600860], [600841, 600984], [600860, 600984], [600815, 600841], [600841, 600860], [600815, 600860], [600841, 600855], [600855, 600984], [600815, 600855], [600815, 600984]]
solution2
1 2015-07-01 05:29:03
l = [('600855+600860', 0.17285466741397107),
('600841+600984', 0.22412665503906901),
('600860+600984', 0.32286764496195208),
('600815+600841', 0.33635550553792876),
('600841+600860', 0.39050910738491346),
('600815+600860', 0.40568508088748162),
('600841+600855', 0.41509110502628777),
('600855+600984', 0.44548966249191208),
('600815+600855', 0.46775374453232454),
('600815+600984', 0.59956672168742298)]
l2 = [list(map(int, item[0].split('+'))) for item in l]
solution3
1 2015-07-01 05:30:00
a=[('600855+600860', 0.17285466741397107), ('600841+600984', 0.22412665503906901), ('600860+600984', 0.32286764496195208), ('600815+600841', 0.33635550553792876), ('600841+600860', 0.39050910738491346), ('600815+600860', 0.40568508088748162), ('600841+600855', 0.41509110502628777), ('600855+600984', 0.44548966249191208), ('600815+600855', 0.46775374453232454), ('600815+600984', 0.59956672168742298)]
[map(int,f[0].split("+")) for f in a ]
[[600855, 600860], [600841, 600984], [600860, 600984], [600815, 600841], [600841, 600860], [600815, 600860], [600841, 600855], [600855, 600984], [600815, 600855], [600815, 600984]]
solution4
1 2015-07-01 05:59:22
If you are using Python 3+,
data = [('600855+600860', 0.17285466741397107), ('600841+600984', 0.22412665503906901), ('600860+600984', 0.32286764496195208), ('600815+600841', 0.33635550553792876), ('600841+600860', 0.39050910738491346), ('600815+600860', 0.40568508088748162), ('600841+600855', 0.41509110502628777), ('600855+600984', 0.44548966249191208), ('600815+600855', 0.46775374453232454), ('600815+600984', 0.59956672168742298)]
numList = []
for (key,value) in data:
numList.append(list(map(int, key.split("+"))))
print(numList)
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