Implement basic arithmetic operations in calculator #3260
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Reviewer's guide (collapsed on small PRs)Reviewer's GuideAdds a SimpleCalculator script implementing basic arithmetic functions (add, subtract, multiply, divide with zero-check) and demonstrates their output via print statements. Class diagram for SimpleCalculator functionsclassDiagram
class add {
+add(a, b)
}
class subtract {
+subtract(a, b)
}
class multiply {
+multiply(a, b)
}
class divide {
+divide(a, b)
}
Flow diagram for SimpleCalculator script executionflowchart TD
A["Start"] --> B["Print 'Simple Calculator'"]
B --> C["Call add(5, 3) and print result"]
C --> D["Call subtract(5, 3) and print result"]
D --> E["Call multiply(5, 3) and print result"]
E --> F["Call divide(5, 3) and print result"]
F --> G["End"]
File-Level Changes
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Hey there - I've reviewed your changes - here's some feedback:
- Wrap the demonstration print statements in a
if __name__ == '__main__':guard so importing the module won’t trigger them. - Instead of returning a string on division by zero, consider raising a
ZeroDivisionErroror using a consistent return type for error handling. - Add type hints to the function signatures (e.g.,
def add(a: float, b: float) -> float) to make the API clearer.
Prompt for AI Agents
Please address the comments from this code review:
## Overall Comments
- Wrap the demonstration print statements in a `if __name__ == '__main__':` guard so importing the module won’t trigger them.
- Instead of returning a string on division by zero, consider raising a `ZeroDivisionError` or using a consistent return type for error handling.
- Add type hints to the function signatures (e.g., `def add(a: float, b: float) -> float`) to make the API clearer.
## Individual Comments
### Comment 1
<location> `SimpleCalculator.py:10-12` </location>
<code_context>
+def multiply(a, b):
+ return a * b
+
+def divide(a, b):
+ if b == 0:
+ return "Error! Division by zero."
+ return a / b
+
</code_context>
<issue_to_address>
**suggestion (bug_risk):** Returning a string on division by zero may lead to inconsistent return types.
Recommend raising an exception or returning None to maintain consistent numeric return types.
</issue_to_address>
### Comment 2
<location> `SimpleCalculator.py:15-19` </location>
<code_context>
+ return "Error! Division by zero."
+ return a / b
+
+print("Simple Calculator")
+print("Addition:", add(5, 3))
+print("Subtraction:", subtract(5, 3))
+print("Multiplication:", multiply(5, 3))
+print("Division:", divide(5, 3))
</code_context>
<issue_to_address>
**suggestion:** Directly invoking print statements at the module level can cause side effects on import.
Wrap the print statements in an if __name__ == "__main__": block to avoid side effects when importing this module.
</issue_to_address>
### Comment 3
<location> `SimpleCalculator.py:11-13` </location>
<code_context>
def divide(a, b):
if b == 0:
return "Error! Division by zero."
return a / b
</code_context>
<issue_to_address>
**suggestion (code-quality):** We've found these issues:
- Lift code into else after jump in control flow ([`reintroduce-else`](https://docs.sourcery.ai/Reference/Default-Rules/refactorings/reintroduce-else/))
- Replace if statement with if expression ([`assign-if-exp`](https://docs.sourcery.ai/Reference/Default-Rules/refactorings/assign-if-exp/))
```suggestion
return "Error! Division by zero." if b == 0 else a / b
```
</issue_to_address>Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
Comment on lines
+10
to
+12
| def divide(a, b): | ||
| if b == 0: | ||
| return "Error! Division by zero." |
There was a problem hiding this comment.
suggestion (bug_risk): Returning a string on division by zero may lead to inconsistent return types.
Recommend raising an exception or returning None to maintain consistent numeric return types.
Comment on lines
+15
to
+19
| print("Simple Calculator") | ||
| print("Addition:", add(5, 3)) | ||
| print("Subtraction:", subtract(5, 3)) | ||
| print("Multiplication:", multiply(5, 3)) | ||
| print("Division:", divide(5, 3)) |
There was a problem hiding this comment.
suggestion: Directly invoking print statements at the module level can cause side effects on import.
Wrap the print statements in an if name == "main": block to avoid side effects when importing this module.
Comment on lines
+11
to
+13
| if b == 0: | ||
| return "Error! Division by zero." | ||
| return a / b |
There was a problem hiding this comment.
suggestion (code-quality): We've found these issues:
- Lift code into else after jump in control flow (
reintroduce-else) - Replace if statement with if expression (
assign-if-exp)
Suggested change
| if b == 0: | |
| return "Error! Division by zero." | |
| return a / b | |
| return "Error! Division by zero." if b == 0 else a / b |
|
Hi, this is my first pull request for Hacktoberfest practice. Please review and merge. 😊 |
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Description
Please include a summary of the change and which issue is fixed. List any dependencies that are required for this change.
Fixes #(issue_no)
Type of change
Please delete options that are not relevant.
Checklist:
README.mdTemplate for README.mdrequirements.txtfile if needed.Project Metadata
If there is no-file/nothing to fill the below fields with, then type: noneExample:If no requirements.txt needed/present, then type none inRequirments.Category:
Title: <write script title here>
Folder: <type the folder name that contains your script>
Requirements: <type the name of text file containing the required to install python packages, type None if no file required>
Script: <Enter the name of the
.pyfile (The main entry point of the program)>Arguments: <enter any arguments that the script needs but
-separeted like: h-c-m>Contributor: <Enter your Github handle/username without url>
Description: <Enter a one line description that describes your script. Also, explain the arguments usage here>
Summary by Sourcery
Implement a SimpleCalculator script with core arithmetic functions, zero-division handling, and sample output
New Features:
Enhancements: