How to display a list of strings dynamically in python-CodePudding

I have a list of strings in python which are in form of an arithmetic problem. So:

p_list = ['32 5', '4 - 1', '345 2390']

I would love each of the list to be arranged in this manner

  32      4       345
   5    - 1      2390
----    ---    ------

So essentially i want the numbers to be right aligned and four spaces between each expression.

I tried doing something like this

final = f"{final}    {problem_list[key]['operand1']}\n{problem_list[key]['operator']} {problem_list[key]['operand2']}"

but i got this instead

thanks in advance

CodePudding user response：

If your objective is to print out the equations, this code arranges them in your desired way:

p_list = ['32   5', '4 - 1', '345   2390']

top = ""
mid = ""
bot = ""
sep = " " * 4

for eq in p_list:
    chars = eq.split()
    width = len(max(chars, key=len))   2
    top  = chars[0].rjust(width)   sep
    mid  = chars[1]   chars[2].rjust(width - 1)   sep
    bot  = "-" * width   sep
    
print(top, mid, bot, sep="\n")

Out:

  32      4       345    
   5    - 1      2390    
----    ---    ------

CodePudding user response：

There are many ways to achieve this. Here's one:

plist = ['32   5', '4 - 1', '345   2390']
spaces = ' ' * 4

def parts(plist):
    return [e.split() for e in plist]

def widths(plist):
    return [max(map(len, e)) 2 for e in parts(plist)]

def get_tokens(plist, idx):
    if idx == 0:
        return [f'{e:>{w}}' for (e, _, _), w in zip(parts(plist), widths(plist))]
    if idx == 1:
        return [f'{s}{n:>{w-1}}' for (_, s, n), w in zip(parts(plist), widths(plist))]
    return ['-' * w for w in widths(plist)]

for idx in range(3):
    print(spaces.join(get_tokens(plist, idx)))

Output:

  32      4       345
   5    - 1      2390
----    ---    ------

CodePudding user response：

Try this:

p_list = ['32   5', '4 - 1', '345   2390']
up= []
down=[]

for op in p_list:
    new = op.split(' ')
    up.append(new[0]   ' '*4)
    if new[1] == '-':
        down.append(str(0 - int(new[-1]))   ' '*4)
    else:
        down.append(' '   new[-1]   ' '*3)
for index,value in enumerate(up):
    print(value, end=' ')
print('')
for index,value in enumerate(down):
    print(value, end=' ')




# 32     4     345     
#  5    -1      2390