Project, Reading Data from a spreadsheet. Error message!!

[Shafla]

i have written the following code from an exercise in a text book;

import openpyxl, pprint
print('Opening workbook...')
wb = openpyxl.load_workbook('censuspopdata.xlsx')
sheet=wb.get_sheet_by_name('Population by Census Tract')
countyData={}

print ('Reading Rows')
for row in range(2, sheet.max_row + 1):
    state = sheet['B' + str(row)].value
    county = sheet['C' + str(row)].value
    pop = sheet['D' + str(row)].value

for row in  range(2,sheet.max_row+1):
    state = sheet['B' + str(row)].value
    county = sheet['C' + str(row)].value
    pop = sheet['D' + str(row)].value

    countyData.setdefault(state, {})

    countyData[state].setdefault(county, {'tracts':0,'pop':0})

    countyData[state][county]['tracts']+=1

    countyData[state][county]['pop']+=int(pop)

for row in range(2,  sheet.max_row+1):
    print('writing results...')

    resultFile=open('census2010.py', 'w')

    resultFile.write('allData =' + pprint.pformt(countyData))

    resultFile.close()

    print ('Done')

once i run the code i get the following error messages;

Error:
Opening workbook...

Warning (from warnings module):
  File "/Users/shaneshomefolder/Desktop/readCenExel.py", line 4
    sheet=wb.get_sheet_by_name('Population by Census Tract')
DeprecationWarning: Call to deprecated function get_sheet_by_name (Use wb[sheetname]).
Reading Rows
writing results...
Traceback (most recent call last):
  File "/Users/shaneshomefolder/Desktop/readCenExel.py", line 31, in <module>
    resultFile.write('allData =' + pprint.pformt(countyData))
AttributeError: module 'pprint' has no attribute 'pformt'
>>> 

i have not come across Deprecation Warning before. and i do not understand the second error. could anybody tell me how to correct my code?

---

ive realised my spelling mistake in pformt.. when ive corrected it and i still get the first error message

Warning (from warnings module):
  File "/Users/shaneshomefolder/Desktop/readCenExel.py", line 4
    sheet=wb.get_sheet_by_name('Population by Census Tract')
DeprecationWarning: Call to deprecated function get_sheet_by_name (Use wb[sheetname]).

and then a constant loop of

writing results...
Done
writing results...
Done
writing results...
Done
writing results...
Done
writing results...
Done
writing results...
Done
writing results...
Done
writing results...

[buran]

Depreciation warning is clear
instead of sheet=wb.get_sheet_by_name('Population by Census Tract') use sheet=wb['Population by Census Tract']

Looking at the file name it's a census data, so I guess great number of rows/records. You print writing results... and Done after writing each row, so I would expect some long output.
Note that it doesn't make to open and close the file for every row. Also it's better to use with context manager when open the file and thus no need to close it.

Once again - I would advise you to find more up to date/better book to follow