You could use textwrap module:

>>> import textwrap
>>> strs = "In my project, I have a bunch of strings that are read in from a file. Most of them, when printed in the command console, exceed 80 characters in length and wrap around, looking ugly."
>>> print(textwrap.fill(strs, 20))
In my project, I
have a bunch of
strings that are
read in from a file.
Most of them, when
printed in the
command console,
exceed 80 characters
in length and wrap
around, looking
ugly.

help on textwrap.fill:

>>> textwrap.fill?

Definition: textwrap.fill(text, width=70, **kwargs)
Docstring:
Fill a single paragraph of text, returning a new string.

Reformat the single paragraph in 'text' to fit in lines of no more
than 'width' columns, and return a new string containing the entire
wrapped paragraph.  As with wrap(), tabs are expanded and other
whitespace characters converted to space.  See TextWrapper class for
available keyword args to customize wrapping behaviour.

Use regex if you don't want to merge a line into another line:

import re


strs = """In my project, I have a bunch of strings that are.
Read in from a file.
Most of them, when printed in the command console, exceed 80.
Characters in length and wrap around, looking ugly."""

print('\n'.join(line.strip() for line in re.findall(r'.{1,40}(?:\s+|$)', strs)))

# Reading a single line at once:
for x in strs.splitlines():
    print '\n'.join(line.strip() for line in re.findall(r'.{1,40}(?:\s+|$)', x))

output:

In my project, I have a bunch of strings
that are.
Read in from a file.
Most of them, when printed in the
command console, exceed 80.
Characters in length and wrap around,
looking ugly.

See what you think about this. This post-processes textwrap.wrap to do justification:

import textwrap

def wrapme(s):

    width = 64
    lines = s.splitlines()
    result = []
    for l in lines:
        if len(l) < 64:
            result.append(l)
        else:
            breaks = textwrap.wrap( l, width, replace_whitespace=False, break_long_words=True, break_on_hyphens=False )
            for b in breaks[:-1]:
                if len(b) == 64:
                    result.append(b)
                    continue
                insert = 64-len(b)
                words = b.split()
                every = insert // (len(words)-1) + 1
                extra = insert % (len(words)-1)
                for i in range(extra):
                    words[i] += ' '
                result.append( (' '*every).join(words) )
            result.append( breaks[-1] )
    return result


for s in (
"Meta 335 to 95\n\nAmzn 188 to 96\n\nNflx 700 to 286\n\nSpot 305 to 80\n\nCRM 311 to 160\n\nSnap 57 to 10\n\nAmd 164 to 60\n\nARKK 126 to 39\n\nThese are all stocks off their Nov 2021 highs. Most of the market was poor phrasing, but this is some good perspective (instead of comparing vs the indices)"
,
"Meta 335 to 95\n\nAmzn 188 to 96\n\nNflx 700 to 286\n\nSpot 305 to 80\n\nCRM 311 to 160\n 57 to 10\n\nAmd 164 to 60\n\nARKK 126 to 39\n\nThese are all stocks off their Nov 2021 highs. Most of the market was poor phrasing, but this is some good perspective (instead of comparing vs the indices)"
,
"Meta 335Spot0  0nnR 1 o10n5 o1\\Ad14t 0nnRK16t rl tocks off their Nov 2021 highs. Most of the market was poor phrasing, but this is some good perspective (instead of comparing vs the indices)"
):
    for line in wrapme(s):
        print(f"|{line}|")

Output:

|Meta 335 to 95|
||
|Amzn 188 to 96|
||
|Nflx 700 to 286|
||
|Spot 305 to 80|
||
|CRM 311 to 160|
||
|Snap 57 to 10|
||
|Amd 164 to 60|
||
|ARKK 126 to 39|
||
|These  are  all  stocks  off  their  Nov 2021 highs. Most of the|
|market  was  poor  phrasing,  but  this is some good perspective|
|(instead of comparing vs the indices)|
|Meta 335 to 95|
||
|Amzn 188 to 96|
||
|Nflx 700 to 286|
||
|Spot 305 to 80|
||
|CRM 311 to 160|
| 57 to 10|
||
|Amd 164 to 60|
||
|ARKK 126 to 39|
||
|These  are  all  stocks  off  their  Nov 2021 highs. Most of the|
|market  was  poor  phrasing,  but  this is some good perspective|
|(instead of comparing vs the indices)|
|Meta 335Spot0  0nnR 1 o10n5 o1\Ad14t 0nnRK16t rl tocks off their|
|Nov  2021  highs. Most of the market was poor phrasing, but this|
|is some good perspective (instead of comparing vs the indices)|