Web developer specializing in React, Vue, and front end development.
To rename column names in Python Pandas, we call the dataframe rename method.
For instance, we write
df = df.rename(columns={'oldName1': 'newName1', 'oldName2': 'newName2'})
to rename the oldName1 and oldName2 columns to newName1 and newName2 with df.rename.
And then we assign the returned dataframe back to df.
To select rows from a DataFrame based on column values with Python Pandas, we can use the loc property.
For instance, we write
df.loc[df['column_name'] == some_value]
to use the df.loc fictionary to get the column value with the df['column_name'] == some_value scalar.
We can combine conditions with & or |.
For instance, we write
df.loc[(df['column_name'] >= A) & (df['column_name'] <= B)]
to return the column values satifying df['column_name'] >= A and df['column_name'] <= B.
To iterate over rows in a DataFrame in Python Pandas, we can use a for loop.
For instance, we write
import pandas as pd
df = pd.DataFrame({'c1': [10, 11, 12], 'c2': [100, 110, 120]})
df = df.reset_index() # make sure indexes pair with number of rows
for index, row in df.iterrows():
print(row['c1'], row['c2'])
to loop through the df dataframe with iterator returned by the df.iterrows method.
We use the row object to get the rows and the keys to get the values.
To install React Bootstrap, we run
npm install react-bootstrap bootstrap
Then in index.js, we add
import 'bootstrap/dist/css/bootstrap.min.css';
to import the CSS.
And in our components, we can add
import { Navbar, Nav, Button } from "react-bootstrap";
to import the components we need.
To use GIFs in rReact Native, we add a line to android/app/build.gradle.
For instance, in android/app/build.gradle, we add
dependencies {
// ...
implementation 'com.facebook.fresco:animated-gif:2.5.0'
// ...
}
so we can add GIFs into our Android React Native app.