PreTeXt Book Examples An example to get you started

x = 1
---
x = 2
---
x = 3

def write_line(file, output):
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    fout = open(file, 'w')
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    fout = open(file, 'r')  #paired
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    fout.write(output + "\n")
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    fout.write(output)  #paired
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    fout.close()
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    fout.close  #paired

total = 0
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total = 1 #paired
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for i in range(10):
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for i in range(0, 10, 1): #paired
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    total += i
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    total = total + 1 #paired
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print(total)

def greet(name):
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    message = "Hello, " + name
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    message = "Hello " + name #paired
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    return message
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print(greet("World"))

def calculate_average(numbers_list):
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def calculateAverage(numbers_list): #paired
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    total = sum(numbers_list)
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    total = numbers_list.sum() #paired
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    count = len(numbers_list)
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    count = numbers_list.count() #paired
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    return total / count if count != 0 else 0
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    return total / count #paired

result = [item for item in my_long_list if item.is_valid()]
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result = filter(lambda item: item.is_valid(), my_long_list) #paired
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formatted = ", ".join(str(x) for x in result)
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formatted = str(result).strip("[]") #paired
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print(f"Found {len(result)} valid items: {formatted}")
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print("Found " + str(len(result)) + " valid items: " + formatted) #paired

scores = []
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scores.append(85)
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scores.add(85) #paired
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scores.append(92)
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scores.append(78)
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scores.append(95)
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scores.append(88)
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scores.append(73)
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scores.append(91)
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average = sum(scores) / len(scores)
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average = sum(scores) / 8 #paired
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print(f"Average: {average:.2f}")
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print("Average: " + average) #paired

def classify_grade(score):
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    if score >= 90:
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    if score > 90: #paired
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        return "A"
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    elif score >= 80:
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        return "B"
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    elif score >= 70:
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        return "C"
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    elif score >= 60:
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        return "D"
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    else:
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        return "F"
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print(classify_grade(85))

public static int sum(int[] arr) {
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public int sum(int[] arr) { #paired
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    int total = 0;
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    for (int num : arr) {
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    for (int i = 0; i < arr.length; i++) { #paired
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        total += num;
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    }
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    return total;
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}

Open the file for writing.

---
Open the file for reading.
 #paired
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Write the header row to the file.

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Loop over each record in the dataset.

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Loop over each column in the dataset.
 #paired
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Write the current record to the file.

---
Close the file when finished.

x = 1
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x = 0 #paired
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y = x + 1
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y = x - 1 #paired
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print(y)

def cube(n):
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    return n ** 3
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    return n * 3 #paired
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print(cube(4))

def process(data):
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    for row in data:
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    for row in range(data): #paired
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        if row is not None:
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        if row != None: #paired
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            results.append(row)
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    return results

def find_duplicates(input_list):
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    seen = set()
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    seen = [] #paired
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    duplicates = []
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    duplicates = set() #paired
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    for item in input_list:
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        if item in seen and item not in duplicates:
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        if item in seen: #paired
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            duplicates.append(item)
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        seen.add(item)
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    return duplicates

a = int(input("Enter a: "))
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a = input("Enter a: ") #paired
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b = int(input("Enter b: "))
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b = input("Enter b: ") #paired
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print(a + b)
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print(a, b) #paired

def is_even(n):
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    return n % 2 == 0
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    return n % 2 != 0 #paired
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print(is_even(4))