Printing a kind of matrix in python - python-3.x

Question

I have to print this Python-code:
Placement Name Won Played Percent Won
1 B Borg 5 10 0.5
2 J Smith 3 6 0.5
3
.
.
.
The number of players will vary, as the players are imported from a txt-file.
The top row (placement, name etc) is constant.
How can I use formatting to do this? Or if there is an easier way.
The info of the players should be aligned as is shown in the example code above.
EDIT:
def showLeaderboard(players):
print()
print("Placement, Name, Won, Played, Percent Won")
position = 1
for i in players:
print(position, end=" ")
i.showPlayerInfo()
position += 1
def readPlayers():
fileplacement = "leads to a directory"
if os.path.exists(fileplacement) and os.path.getsize(fileplacement) > 6:
txtinfo = open("players.txt", "r")
players = []
for row in txtinfo:
infoplayers = row.split(",")
players.append(Spelare(infoSpelare[0], float(infoSpelare[3]), int(infoSpelare[1]), int(infoSpelare[2]))) # "players" is a class, the rest is to import from my txt-file
return players
else:
print("players.txt does not seem to exist or contains unreasonables.")
raise SystemExit(0)

Answer 1

You need to iterate over your data two times. First, to see how wide each column must be, and next to actually print the data.
from typing import List
def prettyprint(headers: List[str], data: List[List[str]], separator: str=" ") -> None:
# initial column width is the width of the headers
columnwidths = [len(s) for s in headers]
for row in data:
# width of the columns in this row
cwidths = [len(s) for s in row]
# Take the max of the previously measured columnwidths and those of this row
columnwidths = [max(ow, cw) for ow, cw in zip(columnwidths, cwidths)]
prints = [headers] + data
for row in prints:
# Pad the data in each cell to the correct width
row_print = [cell.ljust(cwid) for cwid, cell in zip(columnwidths, row)]
print(separator.join(row_print))
d = [['1', 'B Borg', '5', '10', '0.5'], ['2', 'J Smith', '3', '6', '0.5']]
h = ['Placement', 'Name', 'Won', 'Played', 'Percent', 'Won']
prettyprint(h, d)
Gives the output:
Placement Name Won Played Percent
1 B Borg 5 10 0.5
2 J Smith 3 6 0.5
Obviously, you're going to have to modify this to work with your Spelare class. You can also use the functions rjust() and center() if you want a different alignment.

Answer 2

What you want to use is the following string methods:
ljust
rjust
center
Here is an example to get you started:
import sys
player_data = {
"Name": "B Borg",
"Placement": 1,
"Won": 5,
"Played": 10,
"Percent Won": 0.5
}
def print_format(k, val):
if k == "Name":
sys.stdout.write(val.ljust(20, ' '))
if k == "Placement":
sys.stdout.write(val.ljust(15, ' '))
if k == "Won":
sys.stdout.write(val.center(10, ' '))
if k == "Played":
sys.stdout.write(val.center(20, ' '))
if k == "Percent Won":
sys.stdout.write(val.center(10, ' '))
# Print the header
[print_format(k, k) for k in player_data.keys()]
print()
# Print the data:
[print_format(k, str(v)) for k, v in player_data.items()]
print()
(venv) [ttucker#zim bot]$ python justify.py
Name Placement Won Played Percent Won
B Borg 1 5 10 0.5