21. What do the following lines of code do?
with open("Example.txt","a") as writefile:
writefile.write("This is line A\n")
writefile.write("This is line B\n")
- Write to the file “Example.txt”
- Read the file “Example.txt”
- Append the file “Example.txt”
22 What task do the following lines of code perform?
with open('Example2.txt','r') as readfile:
with open('Example3.txt','w') as writefile:
for line in readfile:
writefile.write(line)
- Copy the text from Example2.txt to Example3.txt.
- Print out the content of Example2.txt.
- Check the mode of the open function for each file object.
23. Consider the dataframe df. How would you access the element in the 2nd row and 1st column?
- df.iloc[1,0]
- df.iloc[2,1]
- df.iloc[0,1]
24. In the lab, you learned you can also obtain a series from a dataframe df, select the correct way to assign the column with the header Length to a pandas series to the variable x.
- x=df[‘Length’]
- x=df[[‘Length’]]
- x=df.[[‘Length’]]