loop string set
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10 weeks ago
aj123 ▴ 120

There seems to be something wrong with the code below; im not sure if it is the indentations because im getting a different result each time if i change the indents; I'm not sure which is the correct way to indent.

 fh = open("df_1.csv")
 readr = csv.reader(fh) 
 header = next(readr)
 header
 data = [row for row in readr]
 names = set()
  for row in data : 
   mapID = row[1]
     for n in mapID :
    names.add(n) 
 len(names)
python stringset • 442 views
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This isn't really a bioinformatics question, but we can't really answer the question regardless without understanding what your input and desired output look likes.

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im trying to get the number of genes (names). the desired output is a number. input is a csv file.

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The number of unique gene names? And the names are in the second column of the CSV file?

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yes that is correct

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You can just do something like this then.

fh = open("df_1.csv")
readr = csv.reader(fh) 
header = next(readr)
header
data = [row for row in readr]

names = set(x[1] for x in data)
len(names)
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