What are Python Generators?
Generators are special functions that allow you to iterate over large datasets efficiently by yielding one item at a time, conserving memory.
Why Use Generators?
- Memory Efficiency: Handle large datasets without consuming excessive memory.
- Lazy Evaluation: Generate values on-the-fly as needed.
- Simplified Code: Write cleaner loops and iteration logic.
How to Use Generators
Syntax of a Simple Generator
x
1
def generator_function():2
yield value3
Creating a Simple Generator for Barangay Leaders
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19
1
# Generate a list of notable Filipino leaders one at a time2
3
def barangay_leaders(leaders):4
for leader in leaders:5
yield leader6
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filipino_leaders = ["Jose Rizal", "Andres Bonifacio", "Emilio Aguinaldo", "Apolinario Mabini"]8
9
for leader in barangay_leaders(filipino_leaders):10
print(f"Barangay Leader: {leader}")11
12
"""13
Expected Output: 14
15
Barangay Leader: Jose Rizal16
Barangay Leader: Andres Bonifacio17
Barangay Leader: Emilio Aguinaldo18
Barangay Leader: Apolinario Mabini19
"""Using zip with Generators for Festival Details
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22
1
# Pair festivals with their dates and locations efficiently.2
3
def festival_details(festivals, dates, locations):4
for festival, date, location in zip(festivals, dates, locations):5
yield f"{festival} - {date} - {location}"6
7
festivals = ["Sinulog", "Ati-Atihan", "Pahiyas", "Panagbenga", "MassKara"]8
dates = ["January", "January", "May", "February", "October"]9
locations = ["Cebu City", "Kalibo", "Lucban", "Baguio", "Bacolod"]10
11
for detail in festival_details(festivals, dates, locations):12
print(detail)13
14
"""15
Expected Output: 16
17
Sinulog - January - Cebu City18
Ati-Atihan - January - Kalibo19
Pahiyas - May - Lucban20
Panagbenga - February - Baguio21
MassKara - October - Bacolod22
"""