Getting specific line and value with Python DictReader

Question

I have a csv file and am trying to get one specific value on, say, line 20, column 3.

But so far, all I managed is to display all values on column 3 (here c

Answer 1

In short, convert the output of csv.DictReader to a list format and access the values with index.

Note: The value returned when you access by index will be an object with keys corresponding to the column names in the CSV file

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Use Case:

I had a similar need. I only wanted to read a subset of rows, say lines 10-15 from a total of 100 lines.

A simple solution that worked was to convert it into list:

# Observe that I am converting the output of DictReader into a list format
lines = list(csv.DictReader(open('somefile.csv', 'r')))

# Once I have the list of objects, I can simple access it with range
for i in range(10, 15):
    line = lines[i]
    # If you want to read the value of a specific column
    print line['column_name']

Hope this helps.