Apologize for the newbie question, but I have read the manual, this question, and tried several times without results I expected.
So I was using vim to edit a file (attached). But when running, I got the TabError: inconsistent use of tabs and spaces in indentation error.
Here is what I have tried:
:retab, and :x. Run the file again. Still got the TabError message.:retab! and :x. Run the file again. Still got the TabError message.:retab! 4 and :x. Run the file again. This time it works but I have no idea why? Plus, in the files indentation seems excessively long. (I read here that the editor might display 8 spaces for a tab)My questions are:
What does :retab, :retab!, and :retab! 4 mean?
Why doesn't :retab work on my file?
#!/usr/bin/env python
#Reduce function for computing matrix multiply A*B
#Input arguments:
#variable n should be set to the inner dimension of the matrix product (i.e., the number of columns of A/rows of B)
import sys
import string
import numpy
#number of columns of A/rows of B
n = int(sys.argv[1])
#Create data structures to hold the current row/column values (if needed; your code goes here)
currentkey = None
alist = [] # list for elelents in A
blist = [] # list for elements in B
# input comes from STDIN (stream data that goes to the program)
for line in sys.stdin:
#Remove leading and trailing whitespace
line = line.strip()
#Get key/value
key, value = line.split('\t',1)
print(key, value)
#Parse key/value input (your code goes here)
key = (key.split(',', 1)[0], key.split(',',1)[1])
value = (value.split(',', 1)[0], value.split(',',1)[1], value.split(',',1)[2])
#If we are still on the same key...
if key==currentkey:
#Process key/value pair (your code goes here)
# store all values in a lisl
if value[0]=='A':
alist.append([value[1], value[2]])
else:
blist.append([value[1], value[2]])
#Otherwise, if this is a new key...
else:
#If this is a new key and not the first key we've seen, i.e. currentkey!=None
if currentkey:
#compute/output result to STDOUT (your code goes here)
alist = sorted(alist)
blist = sorted(blist)
newlist = [a[1]*b[1] for a,b in zip(alist, blist)]
res = newlist.sum()
print(currentkey, res)
currentkey = key
#Process input for new key (your code goes here)
Just type :help retab in Vim and read. I think I can't explain it better than the help. Maybe you are missing the optional range part; use % prefix to apply to the whole file. Also useful is :set list to show you every chars; this will show you the tabs and line ends (disable with :set nolist) and :set <name> with no value to see the current value, ex : set tabstop or followed by some value to set.
By showing all chars, enabling and disabling expansion of tabs into spaces with :set expandtab and :set noexpandtab, setting tabstop and by using for ex. :retab! 4 you can play your way around and switch from tabs only and spaces only, and change the tab column width.
This link, vim settings for python might be useful also