Merge pull request #554 from realpython/python-string

Sample code for the article on the string data type

python-string/README.md

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+# Strings and Character Data in Python
+
+This folder provides the code examples for the Real Python tutorial [Strings and Character Data in Python](https://realpython.com/python-string/).

python-string/concatenation.py

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+greeting = "Hello"
+name = "Pythonista"
+print(greeting + ", " + name + "!!!")

python-string/formatting copy.py

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+from datetime import datetime
+
+print(format(1000000, ",.2f"))  # Thousand separators
+print(format("Header", "=^30"))  # Centered and filled
+print(format(datetime.now(), "%a %b %d, %Y"))  # Date

python-string/formatting.py

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+debit = 300.00
+credit = 450.00
+
+template = """
+Account Report
+Credit:  ${credit:.2f}
+Debit:  -${debit:.2f}
+________________
+Balance: ${balance:.2f}"""
+
+print(
+    template.format(
+        credit=credit,
+        debit=debit,
+        balance=credit - debit,
+    )
+)
+
+template = """
+Account Report
+Credit:  $%(credit).2f
+Debit:  -$%(debit).2f
+________________
+Balance: $%(balance).2f"""
+
+print(
+    template
+    % {
+        "credit": credit,
+        "debit": debit,
+        "balance": credit - debit,
+    }
+)

python-string/person.py

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+class Person:
+    def __init__(self, name, age):
+        self.name = name
+        self.age = age
+
+    def __repr__(self):
+        return f"{type(self).__name__}(name='{self.name}', age={self.age})"
+
+    def __str__(self):
+        return f"I'm {self.name}, and I'm {self.age} years old."
+
+
+john = Person("John Doe", 35)
+
+print(repr(john))
+
+print(str(john))

python-string/regexes.py

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+import re
+
+pattern = r"\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b"
+
+regex = re.compile(pattern)
+
+text = """
+    Please contact us at support@example.com
+    or sales@example.com for further information.
+"""
+
+print(regex.findall(text))

python-string/table.py

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+def display_table(data, headers):
+    max_len = max(len(header) for header in headers)
+    print("|".join(header.ljust(max_len) for header in headers))
+    sep = "-" * max_len
+    print("|".join(sep for _ in headers))
+    for row in data:
+        print("|".join(header.ljust(max_len) for header in row))
+
+
+data = [
+    ["Alice", "25", "Python Developer"],
+    ["Bob", "30", "Web Designer"],
+    ["Charlie", "35", "Team Lead"],
+]
+
+headers = ["Name", "Age", "Job Title"]
+
+display_table(data, headers)