Python - Looping through two Dimensional Lists

How to loop through 2d lists in Python.

[mistere]

Nice!!! Thought of an intuitive solution, but couldn't get the loop to work. Thanks again!!

[Xaminn]

That was very informative in such a short amount of time. Thank you for the explanation!

[jsllsj]

Fantastic just what i was looking for, clearly explained thankyou

[peterkim]

thank's a lot sir you helped me to solve my script problem <3

[haider]

Thanks for previous reply my second question is if i want to match only 1st column of first list with 2nd list what is method?
like:
first list = [home, 1], [people, 2]
2nd list = [home, 1], [street, 2]

i wanna see if from first list "home" is matching, ,,,it should print home in 3rd column as you mentioned before . but i want to list number of second column as well but don't want to match that... i wanna match 1st column only

[murodalisharipov]

how do you compare hommer to other names in list?

[davidling]

Because they're both huge lists and i don't want to paste them in the code, it will get to clumsy and rough

[haider]

wanna ask if i have (two) 2 dimensional list like this and want to find duplicate in two different list what is function? like
first list = [home, 1], [people, 2]
2nd list = [home, 1], [street, 2]

so i know home is same in both so what is function which i can apply

[BobMarley-gmie]

Lets say I wanted to loop through a 2d list of a 5x5 grid and want to keep checking each time a user input is inserted to see whether or not the user has created a 2x2 grid of 1's inside the 5x5 grid how would you go about doing this.

[carlknightcoph]

how come the name, age knows whats in the people in the loop ?

[Dopeboyz]

When i create a loop and type print it will display all rows and values i need it to but when i print on new line it will only print out the last row with the values. Is there a way to print in new line or create a variable that will display all rows with all values?

[davidling]

Great Video, But my questions is how do i iterate in two files on the system ? pardon my English

[haider]

Thanks for reply that code is working but not in my current file ... actually i am using python and fetched data from mysql ... now i have two records rows1 and rows 2, , i fetched records and converted into Lists which are rows1 and rows2 ...

but when i run this code then code nothing work and dont show errors too

L3=[]
for item1 in rows1:
for item2 in rows2:
if item1[1]==item2[1]:
L3.append(item1)
print(item1)

but when i run this code in another file just to check then it works

L1= [(1, 'Cat'), (2, 'Dog'), (4, 'Elephant')]
L2 = [(1, 'Dog'), (2, 'Zebra'), (3, 'Elephant')]
L3=[]
for item1 in L1:
for item2 in L2:
if item1[1]==item2[1]:
L3.append(item1)
print(item1)

[kurtross]

Explained nothing - just showed how to write the program.