If / Else condition in a column (python)

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If / Else condition in a column (python)

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I need to construct an if / else in a column in table [6]. Here is the output print (without if / else applied):

Followthecode:

importrequestsimportpandasaspdfrombs4importBeautifulSoupurl_dados=

' link '

r = requests.get(url_dados)


payload =  {'texData':'27/02/2018',
            'selEst':'5/Ibirapuera'}

response = requests.post(url_dados, data=payload)


with open('dados_ibira.html', 'wb') as f:
    f.write(response.text.encode("utf8"))


soup = BeautifulSoup(response.content, 'html.parser')
table = soup.find_all('table')[6]
NO2_Ibirapuera = pd.read_html(str(table).replace(",", "."))


print(NO2_Ibirapuera)

With this, if / else is to be applied to this column with the following conditions:

0 - 40 = Boa  
41 - 80 = Moderada  
81 - 120 = Ruim  
121 - 200 = Muito Ruim 
> 200 = Péssima

I'm confused about separating the column and the if / else application.

python

asked by anonymous 07.03.2018 / 14:19

1 answer

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score 0 · Answer 1

Hello, I apologize for any errors in advance.

By using the pandas, the row that is below the [ was put by Pandas, is the index of the table, soon does not count, you can withdraw.

Now your NO2_Ibirapuera object is in the following organization,

NO2_Ibirapuera = Direct object, does not have direct access to the table. NO2_Ibirapuera [0] = And your table. NO2_Ibirapuera [0] [0] = your first column. NO2_Ibirapuera 0 = your second column.

Now just use NO2_Ibirapuera 0 [x], to define the x argument, with the value you want.

Let's create a function with the conditions:

def condition(var):

if var == "--":
    return "--"

if 0 <= var <= 40:
    return "Boa"

if 41 <= var <= 80:
    return "Moderada"

if 81 <= var <= 120:
    return "Ruim"

if 121 <= var <= 200:
    return "Muito Ruim"

return "Péssima"

Now pass the data through the function:

for x in range(len(NO2_Ibirapuera[0][0])):
try:
    NO2_Ibirapuera[0][1][x] = condition(int(NO2_Ibirapuera[0][0][x]))
except ValueError:
    pass

Why try and except? Because I have to transform the data of the table into integer (int), if it is a letter will appear an error, so with the exception this item will be ignored, going to the next one.

Finalcode:

import requests
import pandas as pd
from bs4 import BeautifulSoup

url_dados='http://sistemasinter.cetesb.sp.gov.br/Ar/php/ar_dados_horarios_resultado.php'

r = requests.get(url_dados)


payload =  {'texData':'27/02/2018',
            'selEst':'5/Ibirapuera'}

response = requests.post(url_dados, data=payload)


with open('dados_ibira.html', 'wb') as f:
    f.write(response.text.encode("utf8"))


soup = BeautifulSoup(response.content, 'html.parser')
table = soup.find_all('table')[6]
NO2_Ibirapuera = pd.read_html(str(table).replace(",", "."))


def condition(var):

    if var == "--":
        return "--"
    
    if 0 <= var <= 40:
        return "Boa"
    
    if 41 <= var <= 80:
        return "Moderada"
    
    if 81 <= var <= 120:
        return "Ruim"
    
    if 121 <= var <= 200:
        return "Muito Ruim"
    
    return "Péssima"


for x in range(len(NO2_Ibirapuera[0][0])):
    try:
        NO2_Ibirapuera[0][1][x] = condition(int(NO2_Ibirapuera[0][0][x]))
    except ValueError:
        pass

print(NO2_Ibirapuera)

# Com isso o if/else é para ser aplicado nessa coluna com as seguintes condições:
#
# 0 - 40 = Boa
# 41 - 80 = Moderada
# 81 - 120 = Ruim
# 121 - 200 = Muito Ruim
# > 200 = Péssima

Vlw, hugs. Any questions, just ask.