Sometimes, we want to convert a Python int into a binary string.
In this article, we’ll look at how to convert a Python int into a binary string.
To convert a Python int into a binary string, we can use the format method.
For instance, we write
s = "{0:b}".format(88)
to convert 88 to a binary string by calling "{0:b}".format with 88.
To convert a Python int into a binary string, we can use the format method.
Sometimes, we want to create new column based on values from other columns or apply a function of multiple columns, row-wise with Python Pandas.
In this article, we’ll look at how to create new column based on values from other columns or apply a function of multiple columns, row-wise with Python Pandas.
To create new column based on values from other columns or apply a function of multiple columns, row-wise with Python Pandas, we can use the data frame apply method.
For instance, we write
import pandas as pd
df = pd.DataFrame({'a': [1, 2], 'b': [3, 4]})
df['c'] = df.apply(lambda row: row.a + row.b, axis=1)
to call df.apply with a function that adds the value from columns a and b row-wise and assign the values to column c.
To create new column based on values from other columns or apply a function of multiple columns, row-wise with Python Pandas, we can use the data frame apply method.
Sometimes, we want to get the filename without the extension from a path in Python.
In this article, we’ll look at how to get the filename without the extension from a path in Python.
To get the filename without the extension from a path in Python, we can use the os.path.splitext method.
For instance, we write
import os
print(os.path.splitext("/path/to/some/file.txt")[0])
to call os.path.splitext with the path to get the filename for.
Then we get the filename without the extension by getting the first part of the split path string list.
To get the filename without the extension from a path in Python, we can use the os.path.splitext method.
Sometimes, we want to check if a variable exists with Python.
In this article, we’ll look at how to check if a variable exists with Python.
To check if a variable exists with Python, we can check with various functions.
For instance, we write
if 'my_var' in locals():
# ...
to call locals to return a dict with all the local variables.
We use 'my_var' in locals() to check if my_var is a local variable in the current scope.
Likewise, we call globals to return a dict with a list of global variables.
For instance, we write
if 'my_var' in glocals():
# ...
to check if the my_var variable is a global variable in the current module.
To check if an attribute is in an object, we use hasattr.
For instance, we write
if hasattr(obj, 'attr_name'):
# ...
to call hasattr to check if the attr_name attribute is in the obj object.
To check if a variable exists with Python, we can check with various functions.
Sometimes, we want to extract an attribute value with Python beautifulsoup.
In this article, we’ll look at how to extract an attribute value with Python beautifulsoup.
To extract an attribute value with Python beautifulsoup, we can use the list of dicts returned by findAll.
For instance, we write
import urllib
f = urllib.urlopen("http://example.com")
s = f.read()
f.close()
from BeautifulSoup import BeautifulStoneSoup
soup = BeautifulStoneSoup(s)
input_tags = soup.findAll(attrs={"name": "stainfo"})
output = [x["stainfo"] for x in input_tags ]
print(output)
to parse the HTML returned from urlopen with
soup = BeautifulStoneSoup(s)
Then we get all the elements with the attribute name stainfo with
soup.findAll(attrs={"name": "stainfo"})
And then we get the stainfo attribute value of each element with
[x["stainfo"] for x in input_tags ]
To extract an attribute value with Python beautifulsoup, we can use the list of dicts returned by findAll.