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up vote 0 down vote favorite I have a CSV with Headings in row 1, Number and Arrival Date , these are columns 0 and 8 . When I write: cv2 = pd.read_csv(honeyfile, skiprows=[0], header=None, usecols=[0,8]) It works fine. however, I wanted to use a string in case more columns are ever added to the report and shifted the count. I cut and paste the headings in from the CSV to make sure Case and white space were correct. This is my code: cv2 = pd.read_csv(honeyfile, skiprows=[0], header=None, usecols=['Number','Arrival Date']) This returns a ValueError saying there are no matching columns with these names? While the error points to this line, it should be noted that the next line of code renames them, cv2.columns = ['Supply Number','Delivery Date'] This works fine when I use the

up vote 6 down vote favorite This is a very beginner question as I am a complete beginner. How is change in speed during a song notated in standard notation? Is it done by changing the time signature for each measure that has a different speed? What if one measure has multiple different speeds? Do you have to write the tempo above each measure that has a different speed? Thank you in advance for your help. (If anyone knows a free site etc. where I can learn about writing standard notation, that would be greatly appreciated.) guitar theory piano notation instruments share | improve this question asked 22 hours ago コナーゲティ