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I was trying to make the string HELLO to OHELL in Python. But couldn’t get any way to rotate it without working with loops. How to code for it in just 1-2 lines so that I could get the desired pattern?
Nội dung chính
- Example Code
- How do you rotate a word in Python?
- How do you rotate a value in Python?
- Is there a rotate command in Python?
- How do I rotate a string to the left?
asked Feb 4, 2022 10:55
2
Here is one way:
def rotate(strg, n):
return strg[n:] + strg[:n]
rotate(‘HELLO’, -1) # ‘OHELL’
Alternatively,
collections.deque (“double-ended queue”) is optimised for queue-related operations. It has a dedicated rotate() method:
from collections import deque
items = deque(‘HELLO’)
items.rotate(1)
”.join(items) # ‘OHELL’
answered Feb 4, 2022 11:06
jppjpp
152k32 gold badges256 silver badges319 bronze badges
1
You can slice and add strings:
>>> s=”HELLO”
>>> s[-1] + s[:-1]
‘OHELL’
This gives you the last character:
>>> s[-1]
‘O’
and this everything but the last:
>>> s[:-1]
‘HELL’
Finally, add them with
+.
answered Feb 4, 2022 10:58
Mike MüllerMike Müller
79.3k18 gold badges157 silver badges159 bronze badges
2
Here is what I use to rotate strings in Python3:
To rotate left by n:
def leftShift(text,n):
return text[n:] + text[:n]
To rotate right by n:
def rightShift(text,n):
return text[-n:] + text[:-n]
answered Mar 18, 2022 23:50
Clayton C.Clayton C.
8631 gold badge8 silver badges16 bronze badges
Here is a simple way of looking it…
s=”HELLO”
for r in range(5):
print(s[r:] + s[:r])
HELLO
ELLOH
LLOHE
LOHEL
OHELL
answered Aug 30, 2022 14:28
KonchogKonchog
1,81018 silver badges21 bronze badges
I would agree with Mike Müller’s answer:
s=”HELLO”
s = s[-1] + s[:-1]
I would like to share another way
of looking s[:-1]
s[0:-1]
This means that it is starting from the start and including everything except for s[-1]. I hope this helped.
answered Mar 16, 2022 20:59
A string is given, our task is to slicing the string into two way. One is clockwise and another anticlockwise.
1. Left (Or anticlockwise) rotate the given string by d elements (where d <= n).
2. Right (Or clockwise) rotate the given string by d elements (where d <= n).
Example
Input: string = “pythonprogram”
d = 2
Output: Left Rotation: thonprogrampy
Right Rotation: ampythonprogr
Algorithm
Step 1: Enter string.
Step 2: Separate string in two parts first & second, for Left rotation Lfirst = str[0 : d] and Lsecond = str[d :]. For Right rotation Rfirst = str[0 : len(str)-d] and Rsecond = str[len(str)-d : ].
Step 3: Now concatenate these two parts second + first accordingly.
Example Code
def rotate(input,d):
# Slice string in two parts for left and right
Lfirst = input[0 : d]
Lsecond = input[d :]
Rfirst = input[0 : len(input)-d]
Rsecond = input[len(input)-d : ]
print (“Left Rotation : “, (Lsecond + Lfirst) )
print (“Right Rotation : “, (Rsecond + Rfirst) )
# Driver program
if __name__ == “__main__”:
str = input(“Enter String ::>”)
d=2
rotate(str,d)
Output
Enter String ::> pythonprogram
Left Rotation: thonprogrampy
Right Rotation: ampythonprogr
Updated on 23-Jun-2022 16:09:07
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How do you rotate a word in Python?
Step 1: Enter string. Step 2: Separate string in two parts first & second, for Left rotation Lfirst = str[0 : d] and Lsecond = str[d :]. For Right rotation Rfirst = str[0 : len(str)-d] and Rsecond = str[len(str)-d : ]. Step 3: Now concatenate these two parts second + first accordingly.
How do you rotate a value in Python?
Let’s discuss different ways we can rotate a list in Python.. Method 1: Rotate a list using Slicing.. Method 2: Rotate a list using list Comprehension.. Method 3: Rotate a list using collections. deque. rotate().
Is there a rotate command in Python?
rotate is undoable, NOT queryable, and NOT editable. The rotate command is used to change the rotation of geometric objects. The rotation values are specified as Euler angles (rx, ry, rz).
…
.
How do I rotate a string to the left?
Method#1: A Simple Solution is to use a temporary string to do rotations. For left rotation, first, copy last n-d characters, then copy first d characters in order to the temporary string. For right rotation, first, copy last d characters, then copy n-d characters.
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