No "Strings" Attached
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Welcome back to Pandas Daily! Your daily 5-minute boost to becoming confident in Python. Today: Dive into Python strings — learn how to create, manipulate, and explore them. "String" is any sequence of characters (letters, numbers, symbols etc.) in quotes. Can be represented in single ☝️ or double quotes ✌️
In [1]: # String in single quotes
'I love Pandas Daily'
Out [1]: 'I love Pandas Daily'
In [2]: # String in double quotes
"I love Pandas Daily"
Out [2]: 'I love Pandas Daily'
↩️ Slight digression - Data in python can be stored in something called a variable. Think of a variable as a name or label for your data — saves you from typing the same stuff over and over again.
In [3]: # Assign string to a variable
stringvariable = "I love Pandas Daily" stringvariable
Out [3]: 'I love Pandas Daily'
🔄 Back to Strings Find number of characters (or length) in string.‼️Note: Spaces (" ") are also counted.
In [4]:
len(stringvariable)
Out [4]: 19
In [5]: # Verify the data type (old readers of PD would know)
type(stringvariable)
Out [5]: str
You can have triple quotes (" " ") too. Mandatory when its a multiline string.
In [6]: # "print" command is often used to display output
multilinestring = """I love Pandas Daily""" print(multilinestring)
Out [6]: I love
Pandas Daily What all we can do with 🎸
In [7]:# Adding
"Hello" + "World"
Out [7]: HelloWorld
As I said, spaces (" ") are considered separately
In [8]:"Hello"
+
" "
+
"World"
Out [8]: Hello World
In [9]:# Uppercase
"hello".upper()
Out [9]:'HELLO'
In [10]:# Lowercase
"Hello".lower()
Out [10]:'hello'
In [11]:
# can be applied to variables too
stringvariable.upper()
Out [11]: 'I LOVE PANDAS DAILY'
🧹 Use 'strip' to cleanup starting or ending white spaces
In [12]:
whitespacestring = "Hello white space "
whitespacestring
Out [12]: 'Hello white space '
In [13]:
whitespacestring.strip()
Out [13]:'Hello white space'
💔 And also break them apart
In [14]:
whitespacestring.split(" ")
Out [14]: ['Hello', 'white', 'space', '']
Character Positions in Strings
String’s characters have positions. First character is numbered as 0 and so on.
In [15]:
# Extract 1st letter "H"
"Hello"[0]
Out [15]: 'H'
In [16]:
# Extract 2nd letter 'e'
"Hello"[1]
Out [16]: 'e'
In [17]:
# Can extract first few together
# End position (3) not included "Hello"[0:3]
Out [17]: Hel'
No number before colon means start from '0'
In [18]:# Works same as above
"Hello"[:3]
Out [18]:'Hel'
In [19]:
# To access the end character
"Hello"[-1]
Out [19]:'o'
No number after colon means till end of string
In [20]:
# Start from 2nd position till end
"Hello"[1:]
Out [20]: 'ello'
🔍 Find any text within a string. Tells the position of first character found.
In [21]:
"zuckerberg@meta.com".find("@meta.com");
Out [21]: 10
‼️-1 means text not present
In [22]:
"zuckerberg@meta.com".find("@gmail.com");
Out [22]: -1
↔️ Can replace any text with ease
In [23]:
# Replace meta with gmail
"zuckerberg@meta.com".replace("meta", "gmail")
Out [23]: 'zuckerberg@gmail.com'
That’s it for today — tomorrow lets dive into Python lists. See you in your inbox! 🐼✨
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Pandas Daily
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