Hướng dẫn python table printer

Nội dung chính

• Introduction to Python Print Table
• How to Print Table in Python?
• How can we Print Tables in Python?
• How does it work?
• How can we print this List in a Formatted Readable Structure?
• Recommended Articles

Introduction to Python Print Table

Python is quite a powerful language when it comes to its data science capabilities. Moreover, the Printing tables within python are sometimes challenging, as the trivial options provide you with the output in an unreadable format. We got you covered. There are multiple options to transform and print tables into many pretty and more readable formats. If you are working on python in a Unix / Linux environment, then readability can be a huge issue from the user’s perspective.

How to Print Table in Python?

There are several ways that can be utilized to print tables in python, namely:

• Using format() function to print dict and lists
• Using tabulate() function to print dict and lists
• texttable
• beautifultable
• PrettyTable

Reading data in a tabular format is much easier as compared to an unstructured format, as given below:

• Pos, Lang, Percent, Change
• 1, Python, 33.2, UP
• 2, Java, 23.54, DOWN
• 3, Ruby, 17.22, UP
• 5, Groovy, 9.22, DOWN
• 6, C, 1.55, UP
• 10, Lua, 10.55, DOWN

Tabular Format

Pos       Lang    Percent  Change
1             Python     33.2          UP
2            Java         23.54     DOWN
3            Ruby       17.22         UP
5           Groovy     9.22      DOWN
6              C            1.55           UP
10          Lua         10.55        DOWN

How can we Print Tables in Python?

We tend to use the information from a dictionary or a list quite frequently. One way of printing the same can be:

1. Unformatted Fashion

Let us take an example to understand this in detail

Code:

## Python program to print the data
d = {1: ["Python", 33.2, 'UP'],
2: ["Java", 23.54, 'DOWN'],
3: ["Ruby", 17.22, 'UP'],
10: ["Lua", 10.55, 'DOWN'],
5: ["Groovy", 9.22, 'DOWN'],
6: ["C", 1.55, 'UP']
} 
print ("Pos,Lang,Percent,Change")
for k, v in d.items():
    lang, perc, change = v
    print (k, lang, perc, change)

Output:

The above example’s output is quite unreadable; let’s take another example of how can we print readable tables in python.

2. Formatted Fashion

Code:

## Python program to print the data
d = {1: ["Python", 33.2, 'UP'],
2: ["Java", 23.54, 'DOWN'],
3: ["Ruby", 17.22, 'UP'],
10: ["Lua", 10.55, 'DOWN'],
5: ["Groovy", 9.22, 'DOWN'],
6: ["C", 1.55, 'UP']
}
print ("{:<8} {:<15} {:<10} {:<10}".format('Pos','Lang','Percent','Change'))
for k, v in d.items():
    lang, perc, change = v
    print ("{:<8} {:<15} {:<10} {:<10}".format(k, lang, perc, change))

Output:

• This gives us a better readability option using the format function in a print command
• What if we want to print the data from a list in a tabular format in python? How can this be done?

3. By utilizing the Format Function

Code:

dota_teams = ["Liquid", "Virtus.pro", "PSG.LGD", "Team Secret"]
data = [[1, 2, 1, 'x'],
['x', 1, 1, 'x'],
[1, 'x', 0, 1],
[2, 0, 2, 1]]
format_row = "{:>12}" * (len(dota_teams) + 1)
print(format_row.format("", *dota_teams))
for team, row in zip(dota_teams, data):
    print(format_row.format(team, *row))

Output:

Note: Here, we are utilizing the format function to define the white spaces to print before each data point so that the resultant output looks like a table.

4. By utilizing the Tabulate Function

Let’s have another example to understand the same in quite some detail.

Code:

## Python program to understand the usage of tabulate function for printing tables in a tabular format
from tabulate import tabulate
data = [[1, 'Liquid', 24, 12],
[2, 'Virtus.pro', 19, 14],
[3, 'PSG.LGD', 15, 19],
[4,'Team Secret', 10, 20]]
print (tabulate(data, headers=["Pos", "Team", "Win", "Lose"]))

Output:

The best part is, that you do not need to format each print statement every time you add a new item to the dictionary or the list. There are several other ways as well that can be utilized to print tables in python, namely:

• texttable
• beautifultable
• PrettyTable
• Otherwise, Pandas is another pretty solution if you are trying to print your data in the most optimized format.

5. Print table using pandas in detail

Pandas is a python library that provides data handling, manipulation, and a diverse range of capabilities in order to manage, alter and create meaningful metrics out of your dataset. Let’s take the below example in order to understand the print table option with pandas in detail.

Code:

## Python program to understand, how to print tables using pandas data frame
import pandas
data = [[1, 'Liquid', 24, 12],
[2, 'Virtus.pro', 19, 14],
[3, 'PSG.LGD', 15, 19],
[4,'Team Secret', 10, 20]]
headers=["Pos", "Team", "Win", "Lose"]
print(pandas.DataFrame(data, headers, headers))
print('                                         ')
print('-----------------------------------------')
print('                                         ')
print(pandas.DataFrame(data, headers))

Output:

How does it work?

• We imported the panda’s library using the import statement
• >> import pandas
• Thereafter declared a list of list and assigned it to the variable named “data.”
• in the very next step, we declared the headers
• >> headers=[“Pos”, “Team”, “Win”, “Lose”]

How can we print this List in a Formatted Readable Structure?

• Pandas have the power of data frames, which can handle, modify, update and enhance your data in a tabular format.
• We have utilized the data frame module of the pandas library along with the print statement to print tables in a readable format.

Conclusion

Reading data in a tabular format is much easier as compared to an unstructured format. Utilizing the capability of python print statements with numerous functions can help you attain better readability for the same.

Recommended Articles

This is a guide to Python Print Table. Here we discuss the introduction to Python Print Table, and how to print tables with different examples. You can also go through our other related articles to learn more –

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4. Python List Functions