Using Loop to Create Excel Sheets with Dataframe Pandas
15,839
Solution 1
import numpy
import pandas as pd
from pandas import ExcelWriter
a = numpy.arange(5)
w = ExcelWriter('e.xlsx')
df_list = []
for i in a:
df = pd.DataFrame({'a': numpy.random.randint(1, 100, 10)})
df_list.append(df)
for i, df in enumerate(df_list):
df.to_excel(w, sheet_name=f'sheet{i}')
w.save()
Solution 2
All you need to do is move the writer decleration outside of the loop
e.g.
a = numpy.arange(5)
w = ExcelWriter('e.xlsx')
for i in a:
df = pd.DataFrame({'a':np.random.randint(1,100,10)})
df.to_excel(w, sheet_name='sheet ' + str(i))
w.save()
Author by
mynameisgooch
Updated on June 23, 2022Comments
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mynameisgooch almost 2 years
I'm working on this function that scrapes a website for fantasy football information and writes it to an Excel file. Ultimately, I want to have information for each week on a separate sheet in the Excel workbook.
The code as posted below works perfectly until I want to write it to the Excel workbook. The workbook ends up having just week 17 data. It seems that the pandas ExcelWriter overwrites the sheet every time when I really want it to add a sheet every time.
I couldn't find anything online about creating sheets with a loop in the pandas ExcelWriter, so I'm not entirely sure if it can be done the way I want it.
import bs4 as bs import urllib.request import pandas as pd from pandas import ExcelWriter for week in range(1,18): #IGNORE MOST OF THIS STUFF BELOW BECAUSE IT WORKS AS IS source = urllib.request.urlopen('http://fftoday.com/stats/playerstats.php?Season=2015&GameWeek='+str(week)+'&PosID=10&LeagueID=1').read() soup = bs.BeautifulSoup(source, 'lxml') table = soup.find('table', width='100%', border='0', cellpadding='2', cellspacing='1') table_rows = table.find_all('tr') player_data = {} for tr in table_rows: td = tr.find_all('td') row = [i.text for i in td] if row != ['\xa0 ', 'Passing', 'Rushing', 'Fantasy'] and row != ['Player\nSort First: \n\n\n\xa0\xa0\n\t\tLast: \n\n\n', 'Team\n\n\n\n', 'G\n\n\n\n', 'Comp\n\n', 'Att\n\n', 'Yard\n\n', 'TD\n\n', 'INT\n\n', 'Att\n\n', 'Yard\n\n', 'TD\n\n', 'FPts\n\n\n\n', 'FPts/G\n\n\n\n']: names = str(row[0]).encode('utf-8') names = str(names)[:-1].split()[1:] names[0:] = [' '.join(names[0:])] row[0] = names[0] player_data[str(row[0])] = row[1:] df_qb = pd.DataFrame.from_dict(player_data) df_qb = df_qb.transpose() df_qb.columns = ['Team', 'Games', 'Completions', 'Att', 'Yards', 'TD', 'INT', 'Rush Att', 'Rush Yards', 'Rush TD', 'Fantasy Points', 'Fantasy Points per Game'] #EVERY THING WORKS JUST FINE UNTIL RIGHT HERE writer = ExcelWriter('Weekly Fantasy Football Data.xlsx') df_qb.to_excel(writer, 'Week ' + str(week)) writer.save()
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mynameisgooch over 7 yearsThanks for getting me on the right track! I moved the writer declaration out of the loop, but that didn't quite work. I was able to get it working by moving the save() declaration out of the loop as well.
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Ajeet Ganga over 7 yearsAwesome. But I would suggest to save more periodically, perhaps within loop and close outside of loop.
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Admin over 3 yearsis this what you wanted?