Question

[Python] I need to make a code that presents the given results.

Answer 1

So the user would input the number of rows and columns.
Then the user would input which number go in the rows and columns.
The the given input would be displayed as a table as shown in the picture.

Answer 2

This is what I have so far....

Here is my current code:

def main():
rowsList =[]
colsList = []
while True:
try:
row = int(input("Please Enter the Number of Rows: "))
while row < 0 :
print("Invalid Input (No Negative Numbers)")
row = int(input("Please Enter the Number of Rows: "))
except ValueError:
print("Invalid Input")
continue
else:
break

while True:
try:
rowNum = int(input("Enter the Value (1): "))
except ValueError:
print("Invalid Input")
continue
else:
break
rowsList.append(int(rowNum))
for i in range (2,row+1):
rowNum = int(input("Enter the Value (" + str(i) + "): "))
rowsList.append(int(rowNum))
print(rowsList)

while True:
try:
col = int(input("Please Enter the Number of Columns: "))
while col < 0 :
print("Invalid Input (No Negative Numbers)")
col = int(input("Please Enter the Number of Columns: "))
except ValueError:
print("Invalid Input")
continue
else:
break

while True:
try:
colNum = int(input("Enter the Value (1): "))
except ValueError:
print("Invalid Input")
continue
else:
break
colsList.append(int(colNum))
for i in range (2,col+1):
colNum = int(input("Enter the Value (" + str(i) + "): "))
colsList.append(int(colNum))
print(colsList)

Table(rowsList,colsList)

def Table(rowsList, colsList):
print(rowsList, colsList)

main()

Answer 3

@518nad @SapphireMoon

Answer 4

Sorry, I could do it in Java but not good with Python arrays.

Answer 5

You set up two one dimensional arrays. You want one two dimensional array. The syntax for working with a 2D array is: array[][]

If you have 3 rows of 4 columns you could create it with:

```
>>> for rows in xrange( 3 ):
... foo.append( [] )
... for cols in xrange( 4 ):
... foo[ rows ].append( 0 )
...
>>> foo
[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]]
```
Lists are zero indexed ( rows will be 0-2 ).

Answer 6

Sorry i am a little lost. Could you elaborate?

Answer 7

The User tells the program how many rows and columns he/she wants.
Then what numbers go in each List.
Each list is then displayed vertically as part of the table.

Like its shown in the picture

Answer 8

A 2 dimensional array is actually an array of arrays. A matrix, which is what your picture looks like, can be thought of as an array of rows, each of which is an array of columns. Since there are two dimensions, two indexes are needed to address an individual item.

To populate a two dimensional array, you generally use a nested loop.

Answer 9

hi

Answer 10

hi

Answer 11

Okay but then how would I display the numbers as a table? And the numbers inputted for each list is Vertical in the table...

Answer 12

Display is a matter of formatted printing.

Answer 13

Okay I edited my code a bit.

Answer 14

Here is my new Code:

def main():
rowsList =[]

while True:
try:
row = int(input("Please Enter the Number of Rows: "))
while row < 0 :
print("Invalid Input (No Negative Numbers)")
row = int(input("Please Enter the Number of Rows: "))
except ValueError:
print("Invalid Input")
continue
else:
break

while True:
try:
col = int(input("Please Enter the Number of Columns: "))
while col < 0 :
print("Invalid Input (No Negative Numbers)")
col = int(input("Please Enter the Number of Columns: "))
except ValueError:
print("Invalid Input")
continue
else:
break
print()

for i in range(1,col+1):
print("[Column " + str(i)+ "]")
for x in range (1,row+1):
rowNum = int(input("Enter the Value (Row " + str(x) + "): "))
rowsList.append(int(rowNum))
print()

Table(rowsList)

def Table(rowsList):
for nums in rowsList:
print(nums)

main()

Answer 15

Now I need it to print each column vertically side by side.

How would I format it to do that?

Answer 16

```
def draw(nRows, nCols):
vals = []
for i in range(nCols):
temp = []
for j in range(nRows):
temp.append(input('Entry: '))
vals.append(temp)
return '\n'.join([
'|'.join([x for x in val]) for val in zip(*vals)
])

print(draw(3, 3))
```
Output:
```
Entry: 1
Entry: 2
Entry: 3
Entry: 4
Entry: 5
Entry: 6
Entry: 7
Entry: 8
Entry: 9
1|4|7
2|5|8
3|6|9
```

Answer 17

I didnt learn zip or .join yet.
Is there another simpler way?

Answer 18

@Agent47 is writing production Python code, beyond the scope of your course. You can use nested loops to go through rowsList and columsList to get each value.