jinja_vs_html_by_hand.py

# -*- coding: utf-8 -*-
"""
Created on Sun Nov 17 15:55:04 2019

@author: Pari
"""

from jinja2 import Template
import numpy as np
import string
import time
table_headers = list(range(30))
table_body_letters = np.random.choice(list(string.ascii_letters), (5000, 20, 30))
table_body = []

for row in table_body_letters:
    rebuilt_row = []
    for column in row:
        rebuilt_row.append(''.join(column))
    table_body.append(rebuilt_row)

    
def by_hand(table_headers, table_body):
    string_by_hand = """
    <table class="table">
       <thead>"""
    
    for header in table_headers:
        string_by_hand += f"<th>{ header }</th>"
    string_by_hand += """   </thead>
       <tbody>"""
    for row in table_body:
        string_by_hand += "<tr>"
        for column in row:
            string_by_hand += f"<td>{ column }</td>"
        string_by_hand += "</tr>"
    string_by_hand += """   </tbody>
    </table>"""
    tm = Template("{{string_by_hand}}")
    msg = tm.render(string_by_hand=string_by_hand)
    return msg


def by_hand_semi_optimized(table_headers, table_body):
    string_by_hand = """
    <table class="table">
       <thead>"""
    temp = [f"<th>{ header }</th>" for header in table_headers]
    string_by_hand += ''.join(temp)
    string_by_hand += """   </thead>
       <tbody>"""
    for row in table_body:
        string_by_hand += "<tr>"
        temp = [f"<td>{ column }</td>" for column in row]
        string_by_hand += ''.join(temp)
        string_by_hand += "</tr>"
    string_by_hand += """   </tbody>
    </table>"""
    tm = Template("{{string_by_hand}}")
    msg = tm.render(string_by_hand=string_by_hand)
    return msg

def by_hand_optimized(table_headers, table_body):
    string_by_hand = """
    <table class="table">
       <thead>"""
    temp = [f"<th>{ header }</th>" for header in table_headers]
    string_by_hand += ''.join(temp)
    string_by_hand += """   </thead>
       <tbody>"""
    temp = ["<tr>" + ''.join([f"<td>{ column }</td>" for column in row]) + "</tr>" 
            for row in table_body]
    string_by_hand += ''.join(temp)
    string_by_hand += """   </tbody>
    </table>"""
    tm = Template("{{string_by_hand}}")
    msg = tm.render(string_by_hand=string_by_hand)
    return msg

def by_jinja(table_headers, table_body):
    template_string = """
    <table class="table">
       <thead>
          {% for header in headers %}
          <th>{{ header }}</th>
          {% endfor %}
       </thead>
       <tbody>
          {% for row in table_body %}
          <tr>
             {% for column in row %}
             <td>{{ column }}</td>
             {% endfor %}
          </tr>
          {% endfor %}
       </tbody>
    </table>
    """
    tm = Template(template_string)
    msg = tm.render(headers=table_headers, table_body=table_body)
    return msg

func_list = [by_hand,
             by_hand_semi_optimized,
             by_hand_optimized,
             by_jinja]

for func in func_list:
    start = time.time()
    out = func(table_headers, table_body)
    end = time.time()
    print(f"{func.__name__}: {end - start}s")

#%timeit by_hand(table_headers, table_body)
#3.12 ms ± 209 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
#
#%timeit by_jinja(table_headers, table_body)
#4.76 ms ± 193 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)

%timeit by_hand(table_headers, table_body)
%timeit by_hand_optimized(table_headers, table_body)
%timeit by_hand_semi_optimized(table_headers, table_body)
%timeit by_jinja(table_headers, table_body)