I have a csv where I need to count the total number for each category:

New_Cell[2]                            Category I need to count

1                                            [A01]
1                                            [A01]
0                                            [A01]
1                                            [A01]
0                                            [A02]
1                                            [A02]
1                                            [A02]
2                                            [A02]
1                                            [A02]

I need it to count each occurrence of TRUE for the if-condition so that it will look like:

[A01] : 3

instead of:

 1 1 1

I currently have:

A01 = "[A01] Officials"

data_out = open("mentees_all_attributes.csv", "rU")
reader = csv.reader(data_out)
next(reader,None)
for line in reader:
    cells = line
    new_cell = cells[0], cells[6], cells[7], cells[8], cells[9], cells[10] # name, # of participation, primary occupation/industry, secondary occupation/industry
    if int(new_cell[1]) > 0: #Isolate all the participants with more than 0
        primary = new_cell[2]
        if primary == A01:
            if True:
                counts =+ 1
                print counts
data_out.close()

To add on to Kevin's answer, you can also use a dictionary to increment the counts for multiple categories.

categories = {}
counts = 0
for line in reader:
    cells = line
    new_cell = cells[0], cells[6], cells[7], cells[8], cells[9], cells[10]
    if int(new_cell[1]):
        primary = new_cell[2]
        if primary:
            if primary not in categories.keys():
                categories[primary] = 0
            categories[primary] += 1

for k,v in categories.items():
    print k, v

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