Hi everyone, I received data in a excel (xls) spreadsheet that is formatted in the first table, illustrated above.

I am attempting to rearrange this data into the format, in the table, just below. Any help would be greatly appreciated.

Thanks much.

First, save it to a `.csv`

file

```
import csv
curr = []
with open('file.csv') as infile, open('path/to/output', 'w') as fout:
outfile = csv.writer(fout)
for area, pop10, pop20, pop50 in csv.reader(infile):
if curr and curr[0] != area:
outfile.writerow(curr)
curr = [area, pop10, pop20, pop50]
continue
if pop10: curr[1] = pop10
if pop20: curr[2] = pop20
if pop50: curr[3] = pop50
```

### Answer：

You can do this pretty succinctly using Pandas:

```
import pandas as pd
dataframe = pd.read_excel("in.xlsx")
merged = dataframe.groupby("AREA").sum()
merged.to_excel("out.xlsx")
```

### Answer：

so, if the csv has 11 columns where ‘AREA’ is the second column, would the code be:

```
def CompressRow(in_csv,out_file):
curr = []
with open(in_csv) as infile, open(out_file, 'w') as fout:
outfile = csv.writer(fout)
for a,b,c,d,e,f,g,h,i,j,k in csv.reader(infile):
if curr and curr[1] != b:
outfile.writerow(curr)
curr = [a,b,c,d,e,f,g,h,i,j,k]
continue
if a: curr[0] = a
if c: curr[2] = c
if d: curr[3] = d
if e: curr[4] = e
if f: curr[5] =f
if g: curr[6]=g
if h: curr[7]=h
if i: curr[8]=i
if j: curr[9]=j
if k: curr[10]=k
#execute CompressRow(in_csv,out_file)
I tried executing it and it gives me
if a: curr[0]=a
IndexError: list assignment index out of range
```

Tags: excel, pythonpython