Merge pull request #379 from realpython/string-concatenation-python

Sample code for the string concatenation article

Author: KateFinegan

string-concatenation-python/README.md

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+# Efficient String Concatenation in Python
+
+This folder provides the code examples for the Real Python tutorial [Efficient String Concatenation in Python](https://realpython.com/python-string-concatenation/).

string-concatenation-python/age.py

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+def age_group(age):
+    if 0 <= age <= 9:
+        result = "a Child!"
+    elif 9 < age <= 18:
+        result = "an Adolescent!"
+    elif 19 < age <= 65:
+        result = "an Adult!"
+    else:
+        result = "in your Golden Years!"
+    print("You are " + result)

string-concatenation-python/concatenate.py

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+def concatenate(iterable, sep=" "):
+    sentence = iterable[0]
+    for word in iterable[1:]:
+        sentence += sep + word
+    return sentence

string-concatenation-python/file.py

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+words = ["Hello,", "World!", "I", "am", "a", "Pythonista!"]
+
+with open("output.txt", "w") as f:
+    print(*words, sep="\n", file=f)

string-concatenation-python/iostring.py

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+from io import StringIO
+
+words = ["Hello,", "World!", "I", "am", "a", "Pythonista!"]
+
+sentence = StringIO()
+sentence.write(words[0])
+for word in words[1:]:
+    sentence.write(" " + word)
+
+sentence.getvalue()
+result = sentence.getvalue()
+
+print(result)

string-concatenation-python/sentence.py

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+from io import StringIO
+
+sentence = StringIO()
+while True:
+    word = input("Enter a word (or './!/?' to end the sentence): ")
+    if word in ".!?":
+        sentence.write(word)
+        break
+    if sentence.tell() == 0:
+        sentence.write(word)
+    else:
+        sentence.write(" " + word)
+
+print("The concatenated sentence is:", sentence.getvalue())

string-concatenation-python/table.py

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+data = [
+    ["Name", "Age", "Hometown"],
+    ["Alice", "25", "New York"],
+    ["Bob", "30", "Los Angeles"],
+    ["Charlie", "35", "Chicago"],
+]
+
+
+def display_table(data):
+    max_len = max(len(header) for header in data[0])
+    sep = "-" * max_len
+    for row in data:
+        print("|".join(header.ljust(max_len) for header in row))
+        if row == data[0]:
+            print("|".join(sep for _ in row))
+
+
+display_table(data)