Printing Lists as Tabular Data

Question

I am quite new to Python and I am now struggling with formatting my data nicely for printed output   I have one list that is used for two headings  and a matrix that should be the contents of the table  Like so   teams list     Man Utd    Man City    T Hotspur   data   np array   1  2  1                     0  1  0                     2  4  2      Note that the heading names are not necessarily the same lengths  The data entries are all integers  though   Now  I want to represent this in a table format  something like this               Man Utd   Man City   T Hotspur   Man Utd         1          0           0  Man City         1          1           0 T Hotspur         0          1           2   I have a hunch that there must be a data structure for this  but I cannot find it  I have tried using a dictionary and formatting the printing  I have tried for-loops with indentation and I have tried printing as strings   I am sure there must be a very simple way to do this  but I am probably missing it due to lack of experience

User · Answer

I found this just looking for a way to output simple columns. If you just need no-fuss columns, then you can use this:

print("Titlex\tTitley\tTitlez")
for x, y, z in data:
    print(x, "\t", y, "\t", z)

EDIT: I was trying to be as simple as possible, and thereby did some things manually instead of using the teams list. To generalize to the OP's actual question:

#Column headers
print("", end="\t")
for team in teams_list:
    print(" ", team, end="")
print()
# rows
for team, row in enumerate(data):
    teamlabel = teams_list[team]
    while len(teamlabel) < 9:
        teamlabel = " " + teamlabel
    print(teamlabel, end="\t")
    for entry in row:
        print(entry, end="\t")
    print()

Ouputs:

          Man Utd  Man City  T Hotspur
  Man Utd       1       2       1   
 Man City       0       1       0   
T Hotspur       2       4       2

But this no longer seems any more simple than the other answers, with perhaps the benefit that it doesn't require any more imports. But @campkeith's answer already met that and is more robust as it can handle a wider variety of label lengths.

User · Answer

When I do this  I like to have some control over the details of how the table is formatted  In particular  I want header cells to have a different format than body cells  and the table column widths to only be as wide as each one needs to be  Here s my solution   def format matrix header  matrix                    top format  left format  cell format  row delim  col delim       table           header      name    row for name  row in zip header  matrix       table format                 len header     top format                        len matrix      left format    len header     cell format       col widths    max                        len format format cell  0                         for format  cell in zip col format  col                     for col format  col in zip zip  table format   zip  table        return row delim join                 col delim join                     format format cell  width                     for format  cell  width in zip row format  row  col widths                  for row format  row in zip table format  table    print format matrix   Man Utd    Man City    T Hotspur    Really Long Column                          1  2  1  -1    0  1  0  5    2  4  2  2    0  1  0  6                                      lt           gt    3f      n            Here s the output                        Man Utd   Man City   T Hotspur   Really Long Column Man Utd                1 000      2 000       1 000               -1 000 Man City               0 000      1 000       0 000                5 000 T Hotspur              2 000      4 000       2 000                2 000 Really Long Column     0 000      1 000       0 000                6 000

User · Answer

The following function will create the requested table  with or without numpy  with Python 3  maybe also Python 2   I have chosen to set the width of each column to match that of the longest team name  You could modify it if you wanted to use the length of the team name for each column  but will be more complicated    Note  For a direct equivalent in Python 2 you could replace the zip with izip from itertools   def print results table data  teams list       str l   max len t  for t in teams list      print     join      gt  length s   format t  length   str l  for t in         teams list        for t  row in zip teams list  data           print     join      gt  length s   format str x   length   str l  for x in  t    row     teams list     Man Utd    Man City    T Hotspur   data     1  2  1            0  1  0            2  4  2    print results table data  teams list    This will produce the following table               Man Utd  Man City T Hotspur   Man Utd         1         2         1  Man City         0         1         0 T Hotspur         2         4         2   If you want to have vertical line separators  you can replace     join with       join   References    lots about formatting https   pyformat info   old and new formatting styles   the official Python tutorial  quite good  - https   docs python org 3 tutorial inputoutput html the-string-format-method official Python information  can be difficult to read  - https   docs python org 3 library string html string-formatting Another resource - https   www python-course eu python3 formatted output php

User · Answer

Pure Python 3  def print table data  cols  wide          Prints formatted data on columns of given width         n  r   divmod len data   cols      pat             format wide      line     n  join pat   cols for   in range n       last line   pat   r     print line format  data       print last line format  data n cols      data    str i  for i in range 27   print table data  6  12    Will print  0           1           2           3           4           5            6           7           8           9           10          11           12          13          14          15          16          17           18          19          20          21          22          23           24          25          26

User · Answer

Some ad-hoc code  row format   quot    gt 15  quot     len teams list    1  print row format format  quot  quot    teams list   for team  row in zip teams list  data       print row format format team   row    This relies on str format   and the Format Specification Mini-Language

User · Answer

I know that I am late to the party  but I just made a library for this that I think could really help  It is extremely simple  that s why I think you should use it  It is called TableIT  Basic Use To use it  first follow the download instructions on the GitHub Page  Then import it  import TableIt  Then make a list of lists where each inner list is a row  table          4  3   quot Hi quot         2  1  808890312093        5   quot Hi quot    quot Bye quot      Then all you have to do is print it  TableIt printTable table   This is the output you get   --------------------------------------------    4              3              Hi               2              1              808890312093     5              Hi             Bye             --------------------------------------------   Field Names You can use field names if you want to  if you aren t using field names you don t have to say useFieldNames False because it is set to that by default    TableIt printTable table  useFieldNames True   From that you will get   --------------------------------------------    4              3              Hi              -------------- -------------- --------------    2              1              808890312093     5              Hi             Bye             --------------------------------------------   There are other uses to  for example you could do this  import TableIt  myList           quot Name quot    quot Email quot          quot Richard quot    quot richard fakeemail com quot          quot Tasha quot    quot tash fakeemail com quot      TableIt print myList  useFieldNames True   From that   -----------------------------------------------    Name                    Email                    ----------------------- -----------------------    Richard                 richard fakeemail com     Tasha                   tash fakeemail com       -----------------------------------------------   Or you could do  import TableIt  myList           quot  quot    quot a quot    quot b quot          quot x quot    quot a   x quot    quot a   b quot          quot z quot    quot a   z quot    quot z   b quot      TableIt printTable myList  useFieldNames True   And from that you get   -----------------------            a       b        ------- ------- -------    x       a   x   a   b     z       a   z   z   b    -----------------------   Colors You can also use colors  You use colors by using the color option  by default it is set to None  and specifying RGB values  Using the example from above  import TableIt  myList           quot  quot    quot a quot    quot b quot          quot x quot    quot a   x quot    quot a   b quot          quot z quot    quot a   z quot    quot z   b quot      TableIt printTable myList  useFieldNames True  color  26  156  171    Then you will get   Please note that printing colors might not work for you but it does works the exact same as the other libraries that print colored text  I have tested and every single color works  The blue is not messed up either as it would if using the default 34m ANSI escape sequence  if you don t know what that is it doesn t matter   Anyway  it all comes from the fact that every color is RGB value rather than a system default  More Info For more info check the GitHub Page

User · Answer

gt  gt  gt  import pandas  gt  gt  gt  pandas DataFrame data  teams list  teams list             Man Utd  Man City  T Hotspur Man Utd    1        2         1         Man City   0        1         0         T Hotspur  2        4         2

User · Answer

There are some light and useful python packages for this purpose   1  tabulate   https   pypi python org pypi tabulate  from tabulate import tabulate print tabulate    Alice   24     Bob   19    headers   Name    Age       Name      Age ------  ----- Alice      24 Bob        19   tabulate has many options to specify headers and table format   print tabulate    Alice   24     Bob   19    headers   Name    Age    tablefmt  orgtbl        Name       Age    -------- -------    Alice       24     Bob         19     2  PrettyTable  https   pypi python org pypi PrettyTable  from prettytable import PrettyTable t   PrettyTable   Name    Age    t add row   Alice   24   t add row   Bob   19   print t     ------- -----     Name   Age    ------- -----    Alice    24      Bob     19    ------- -----    PrettyTable has options to read data from csv  html  sql database  Also you are able to select subset of data  sort table and change table styles   3  texttable  https   pypi python org pypi texttable  from texttable import Texttable t   Texttable   t add rows    Name    Age      Alice   24     Bob   19    print t draw       ------- -----    Name    Age                     Alice   24     ------- -----    Bob     19     ------- -----    with texttable you can control horizontal vertical align  border style and data types   4  termtables  https   github com nschloe termtables  import termtables as tt  string   tt to string         Alice   24     Bob   19        header   Name    Age        style tt styles ascii thin double        alignment  ll         padding  0  1     print string     ------- -----    Name    Age                     Alice   24     ------- -----    Bob     19     ------- -----    with texttable you can control horizontal vertical align  border style and data types   Other options    terminaltables Easily draw tables in terminal console applications from a list of lists of strings  Supports multi-line rows  asciitable Asciitable can read and write a wide range of ASCII table formats via built-in Extension Reader Classes

User · Answer

I think this is what you are looking for   It s a simple module that just computes the maximum required width for the table entries and then just uses rjust and ljust to do a pretty print of the data   If you want your left heading right aligned just change this call    print  gt  gt  out  row 0  ljust col paddings 0    1     From line 53 with    print  gt  gt  out  row 0  rjust col paddings 0    1

User · Answer

A simple way to do this is to loop over all columns  measure their width  create a row template for that max width  and then print the rows  It s not exactly what you are looking for  because in this case  you first have to put your headings inside the table  but I m thinking it might be useful to someone else   table               Man Utd    Man City    T Hotspur          Man Utd   1  0  0         Man City   1  1  0         T Hotspur   0  1  2     def print table table       longest cols              max  len str row i    for row in table     3          for i in range len table 0              row format      join      gt     str longest col        for longest col in longest cols       for row in table          print row format format  row     You use it like this    gt  gt  gt  print table table               Man Utd   Man City   T Hotspur   Man Utd         1          0           0  Man City         1          1           0 T Hotspur         0          1           2

User · Answer

To create a simple table using terminaltables Open the terminal or your command prompt and run pip install terminaltables You can print and python list as the following from terminaltables import AsciiTable  l         Head    Head        R1 C1    R1 C2        R2 C1    R2 C2        R3 C1    R3 C2      table   AsciiTable l   print table table   They have other cool tables don t forget to check them out  Just google their library  Hope that helps  100

User · Answer

I would try to loop through the list and use a CSV formatter to represent the data you want    You can specify tabs  commas  or any other char as the delimiter   Otherwise  just loop through the list and print   t  after each element  http   docs python org library csv html

User · Answer

Updating Sven Marnach s answer to work in Python 3 4   row format      gt 15      len teams list    1  print row format format      teams list   for team  row in zip teams list  data       print row format format team   row

User · Answer

Python actually makes this quite easy   Something like  for i in range 10       print   -12i -12i     10    i  20    i    will have the output  1           1            10          20           100         400          1000        8000         10000       160000       100000      3200000      1000000     64000000     10000000    1280000000   100000000   25600000000 1000000000  512000000000   The   within the string is essentially an escape character and the characters following it tell python what kind of format the data should have  The   outside and after the string is telling python that you intend to use the previous string as the format string and that the following data should be put into the format specified   In this case I used   -12i  twice  To break down each part    -   left align   12   how much space to be given to this part of the output   i   we are printing an integer    From the docs  https   docs python org 2 library stdtypes html string-formatting

[python] Printing Lists as Tabular Data

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