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Merge branch 'master' into python-mappings
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‎python-string-formatting/README.md‎

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# Python String Formatting: Available Tools and Their Features
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This folder provides the code examples for the Real Python tutorial [Python String Formatting: Available Tools and Their Features](https://realpython.com/python-string-formatting/).

‎python-string-formatting/f-strings.py‎

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name = "Bob"
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print(f"Hello, {name}!")
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print(f"The number is {42}")
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a = 5
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b = 10
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print(f"{a} plus {b} is {a + b}")
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debit = 300.00
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credit = 450.00
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print(f"Debit: ${debit}, Credit: ${credit}, Balance: ${credit - debit}")
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print(
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f"Debit: ${debit:.2f}, Credit: ${credit:.2f}, "
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f"Balance: ${credit - debit:.2f}"
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)

‎python-string-formatting/format-method.py‎

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number_template = "The number is {}"
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sum_template = "{0} plus {1} is {2}"
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print(number_template.format(42))
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a = 5
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b = 10
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print(sum_template.format(a, b, a + b))
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debit = 300.00
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credit = 450.00
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template = "Debit: ${0:.2f}, Credit: ${1:.2f}, Balance: ${2:.2f}"
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print(template.format(debit, credit, credit - debit))

‎python-string-formatting/grades_report_v1.py‎

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student = {
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"name": "John Doe",
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"subjects": [
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{
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"name": "Mathematics",
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"grade": 88,
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"comment": "Excellent improvement.",
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},
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{
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"name": "Science",
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"grade": 92,
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"comment": "Outstanding performance.",
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},
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{
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"name": "History",
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"grade": 78,
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"comment": "Needs to participate more.",
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},
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{"name": "Art", "grade": 85, "comment": "Very creative."},
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],
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}
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def build_student_report(student):
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report_header = f"Progress Report. Student: {student['name']}"
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total = sum(subject["grade"] for subject in student["subjects"])
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average = total / len(student["subjects"])
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average_report = f"Average: {average:.2f} / 100\n"
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subject_report = "Course Details:\n"
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for subject in student["subjects"]:
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subject_report += (
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f"{subject['name']:<15} "
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f"Grade: {subject['grade']:3d} "
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f"Comment: {subject['comment']}\n"
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)
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return f"""
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{report_header}
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{average_report}
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{subject_report}
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Thank you for reviewing the progress report.
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"""
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print(build_student_report(student))

‎python-string-formatting/grades_report_v2.py‎

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SUBJECT_TEMPLATE = "{name:<15} Grade: {grade:3} Comment: {comment}"
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REPORT_TEMPLATE = """
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Progress Report. Student: {name}
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Average: {average:.2f} / 100
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Course Details:
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{subjects_report}
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Thank you for reviewing the progress report.
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"""
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student = {
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"name": "John Doe",
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"subjects": [
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{
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"name": "Mathematics",
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"grade": 88,
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"comment": "Excellent improvement.",
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},
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{
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"name": "Science",
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"grade": 92,
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"comment": "Outstanding performance.",
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},
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{
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"name": "History",
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"grade": 78,
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"comment": "Needs to participate more.",
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},
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{"name": "Art", "grade": 85, "comment": "Very creative."},
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],
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}
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def build_student_report(student):
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data = {
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"name": student["name"],
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"average": sum(subject["grade"] for subject in student["subjects"])
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/ len(student["subjects"]),
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"subjects_report": "\n".join(
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SUBJECT_TEMPLATE.format(**subject)
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for subject in student["subjects"]
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),
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}
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return REPORT_TEMPLATE.format(**data)
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print(build_student_report(student))

‎python-string-formatting/modulo-operator.py‎

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print("%d" % 123.123) # As an integer
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print("%o" % 42) # As an octal
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print("%x" % 42) # As a hex
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print("%e" % 1234567890) # In scientific notation
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print("%f" % 42) # As a floating-point number
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# Named replacement fields
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jane = {"first_name": "Jane", "last_name": "Doe"}
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print("Full name: %(first_name)s %(last_name)s" % jane)
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# Minimal width of 15 chars
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print("%-15f" % 3.1416) # Aligned to the left
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print("%15f" % 3.1416) # Aligned to the right
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# Dynamic width
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width = 15
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print("%-*f" % (width, 3.1416))
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print("%*f" % (width, 3.1416))
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# Precision
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print("%.2f" % 3.141592653589793)
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print("%.4f" % 3.141592653589793)
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print("%.8f" % 3.141592653589793)
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print("%o" % 10)
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print("%#o" % 10)
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print("%x" % 31)
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print("%#x" % 31)
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print("%05d" % 42)
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print("%10d" % 42)
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print("%-10d" % 42)
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print("% d" % 42)
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print("% d" % -42)
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print("%+d" % 42)
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print("%+d" % -42)

‎python-string-formatting/sales_report.py‎

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REPORT_TEMPLATE = """
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Monthly Sales Report
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--------------------
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Report Date Range: {start_date} to {end_date}
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Number of Transactions: {sep:.>20} {transactions:,}
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Average Transaction Value: {sep:.>11} ${avg_transaction:,.2f}
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Total Sales: {sep:.>23} ${total_sales:,.2f}
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"""
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def build_sales_report(sales_data, report_template=REPORT_TEMPLATE):
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total_sales = sum(sale["amount"] for sale in sales_data)
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transactions = len(sales_data)
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avg_transaction = total_sales / transactions
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return report_template.format(
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sep=".",
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start_date=sales_data[0]["date"],
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end_date=sales_data[-1]["date"],
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total_sales=total_sales,
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transactions=transactions,
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avg_transaction=avg_transaction,
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)
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sales_data = [
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{"date": "2024-04-01", "amount": 100},
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{"date": "2024-04-02", "amount": 200},
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{"date": "2024-04-03", "amount": 300},
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{"date": "2024-04-04", "amount": 400},
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{"date": "2024-04-05", "amount": 500},
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]
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print(build_sales_report(sales_data))

‎python-string-interpolation/README.md‎

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# String Interpolation in Python: Exploring Available Tools
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This folder provides the code examples for the Real Python tutorial [String Interpolation in Python: Exploring Available Tools](https://realpython.com/python-string-interpolation/).

‎python-string-interpolation/article.py‎

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class Article:
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def __init__(self, title, author, pub_date):
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self.title = title
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self.author = author
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self.pub_date = pub_date
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def __str__(self):
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return (
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f"Article: {self.title}\n"
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f"Author: {self.author}\n"
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f"Published: {self.pub_date}\n"
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)
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def __repr__(self):
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return (
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f"{type(self).__name__}("
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f"title={self.title}, "
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f"author={self.author}, "
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f"pub_date={self.pub_date})"
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)
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if __name__ == "__main__":
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article = Article(
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title="String Interpolation in Python: Exploring Available Tools",
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author="Real Python",
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pub_date="2024-05-15",
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)
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print(f"{article!s}")
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print(f"{article!r}")

‎python-string-interpolation/concatenation.py‎

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name = "Pythonista"
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day = "Friday" # Of course 😃
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print("Hello, " + name + "! Today is " + day + ".")

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