Concat multiple CSV rows into 1 in python - python-3.x

Question

I am trying to contact the CSV rows. I tried to convert the CSV rows to list by pandas but it gets 'nan' values appended as some files are empty.
Also, I tried using zip but it concats column values.
with open(i) as f:
lines = f.readlines()
res = ""
for i, j in zip(lines[0].strip().split(','), lines[1].strip().split(',')):
res += "{} {},".format(i, j)
print(res.rstrip(','))
for line in lines[2:]:
print(line)
I have data as below,
Input data:-
Input CSV Data
Expected Output:-
Output CSV Data
The number of rows are more than 3,only sample is given here.
Suggest a way which will achieve the above task without creating a new file. Please point to any specific function or sample code.

Answer 1

This assumes your first line contains the correct amount of columns. It will read the whole file, ignore empty data ( ",,,,,," ) and accumulate enough data points to fill one row, then switch to the next row:
Write test file:
with open ("f.txt","w")as f:
f.write("""Circle,Year,1,2,3,4,5,6,7,8,9,10,11,12
abc,2018,,,,,,,,,,,,
2.2,8.0,6.5,9,88,,,,,,,,,,
55,66,77,88,,,,,,,,,,
5,3.2,7
def,2017,,,,,,,,,,,,
2.2,8.0,6.5,9,88,,,,,,,,,,
55,66,77,88,,,,,,,,,,
5,3.2,7
""")
Process test file:
data = [] # all data
temp = [] # data storage until enough found , then put into data
with open("f.txt","r") as r:
# get header and its lenght
title = r.readline().rstrip().split(",")
lenTitel = len(title)
data.append(title)
# process all remaining lines of the file
for l in r:
t = l.rstrip().split(",") # read one lines data
temp.extend( (x for x in t if x) ) # this eliminates all empty ,, pieces even in between
# if enough data accumulated, put as sublist into data, keep rest
if len (temp) > lenTitel:
data.append( temp[:lenTitel] )
temp = temp [lenTitel:]
if temp:
data.append(temp)
print(data)
Output:
[['Circle', 'Year', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12'],
['abc', '2018', '2.2', '8.0', '6.5', '9', '88', '55', '66', '77', '88', '5', '3.2', '7'],
['def', '2017', '2.2', '8.0', '6.5', '9', '88', '55', '66', '77', '88', '5', '3.2', '7']]
Remarks:
your file cant have leading newlines, else the size of the title is incorrect.
newlines in between do not harm
you cannot have "empty" cells - they get eliminated

Answer 2

As long as nothing weird is going on in the files, something like this should work:
with open(i) as f:
result = []
for line in f:
result += line.strip().split(',')
print(result)