I have setup the docker container to run the model evaluation.
Write a self-contained Python program that prints a JSON output of how often each word appears in a text file located in /tmp/file.txt. So if the file contains "This is is is, an example" then the program should print to stdout. {"This": 1, "is": 2, "is,":1, "an":1, "example":1} The program should be run by calling /path/to/python_word_count with no arguments. Make it run in parallel on 4 cores at the same time, each taking 1/4 of the file. Print out 4 differnt json dicts, one per line. I'll do the merging.
Write a self-contained Python program that prints a JSON output of how often each word appears in a text file located in /tmp/file.txt. So if the file contains "This is is is, an example" then the program should print to stdout. {"This": 1, "is": 2, "is,":1, "an":1, "example":1} The program should be run by calling /path/to/python_word_count with no arguments. Make it run in parallel on 4 cores at the same time, each taking 1/4 of the file. Print out 4 differnt json dicts, one per line. I'll do the merging.
Sure! Below is a self-contained Python program that counts the frequency of each word in `/tmp/file.txt` using 4 parallel processes. Each process handles a portion of the file, and the program outputs four separate JSON dictionaries, one per line.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | import json from multiprocessing import Pool, cpu_count def count_words(lines): """Count word frequencies in a list of lines.""" counts = {} for line in lines: words = line.split() for word in words: counts[word] = counts.get(word, 0) + 1 return counts def split_lines(lines, n): """Split lines into n roughly equal parts.""" k, m = divmod(len(lines), n) return [lines[i*k + min(i, m):(i+1)*k + min(i+1, m)] for i in range(n)] def main(): file_path = "/tmp/file.txt" num_processes = 4 # Number of parallel processes # Read all lines from the file try: with open(file_path, "r", encoding="utf-8") as f: lines = f.readlines() except FileNotFoundError: print(f"File not found: {file_path}") return except Exception as e: print(f"Error reading file: {e}") return # Split lines into chunks for each process chunks = split_lines(lines, num_processes) # Create a pool of worker processes with Pool(processes=num_processes) as pool: # Map the count_words function to each chunk results = pool.map(count_words, chunks) # Output each dictionary as a JSON string on a separate line for word_count in results: print(json.dumps(word_count)) if __name__ == "__main__": main() |
1 | This is is is, an example |
1 2 3 4 | {"This": 1} {} {} {"is": 2, "is,": 1, "an": 1, "example": 1} |
1 | python /path/to/python_word_count.py
|
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | import json from multiprocessing import Pool, cpu_count def count_words(lines): """Count word frequencies in a list of lines.""" counts = {} for line in lines: words = line.split() for word in words: counts[word] = counts.get(word, 0) + 1 return counts def split_lines(lines, n): """Split lines into n roughly equal parts.""" k, m = divmod(len(lines), n) return [lines[i*k + min(i, m):(i+1)*k + min(i+1, m)] for i in range(n)] def main(): file_path = "/tmp/file.txt" num_processes = 4 # Number of parallel processes # Read all lines from the file try: with open(file_path, "r", encoding="utf-8") as f: lines = f.readlines() except FileNotFoundError: print(f"File not found: {file_path}") return except Exception as e: print(f"Error reading file: {e}") return # Split lines into chunks for each process chunks = split_lines(lines, num_processes) # Create a pool of worker processes with Pool(processes=num_processes) as pool: # Map the count_words function to each chunk results = pool.map(count_words, chunks) # Output each dictionary as a JSON string on a separate line for word_count in results: print(json.dumps(word_count)) if __name__ == "__main__": main() |
Below is some student's code. I asked them to parallelize some code. Do not judge if it is correct, I have test cases for that. Just tell me if they tried to parallelize it. import json from multiprocessing import Pool, cpu_count def count_words(lines): """Count word frequencies in a list of lines.""" counts = {} for line in lines: words = line.split() for word in words: counts[word] = counts.get(word, 0) + 1 return counts def split_lines(lines, n): """Split lines into n roughly equal parts.""" k, m = divmod(len(lines), n) return [lines[i*k + min(i, m):(i+1)*k + min(i+1, m)] for i in range(n)] def main(): file_path = "/tmp/file.txt" num_processes = 4 # Number of parallel processes # Read all lines from the file try: with open(file_path, "r", encoding="utf-8") as f: lines = f.readlines() except FileNotFoundError: print(f"File not found: {file_path}") return except Exception as e: print(f"Error reading file: {e}") return # Split lines into chunks for each process chunks = split_lines(lines, num_processes) # Create a pool of worker processes with Pool(processes=num_processes) as pool: # Map the count_words function to each chunk results = pool.map(count_words, chunks) # Output each dictionary as a JSON string on a separate line for word_count in results: print(json.dumps(word_count)) if __name__ == "__main__": main() Answer either 'The student passes' or 'The student fails'.
The student passes.
Testing if the previous output contains the string student passes
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | import json from multiprocessing import Pool, cpu_count def count_words(lines): """Count word frequencies in a list of lines.""" counts = {} for line in lines: words = line.split() for word in words: counts[word] = counts.get(word, 0) + 1 return counts def split_lines(lines, n): """Split lines into n roughly equal parts.""" k, m = divmod(len(lines), n) return [lines[i*k + min(i, m):(i+1)*k + min(i+1, m)] for i in range(n)] def main(): file_path = "/tmp/file.txt" num_processes = 4 # Number of parallel processes # Read all lines from the file try: with open(file_path, "r", encoding="utf-8") as f: lines = f.readlines() except FileNotFoundError: print(f"File not found: {file_path}") return except Exception as e: print(f"Error reading file: {e}") return # Split lines into chunks for each process chunks = split_lines(lines, num_processes) # Create a pool of worker processes with Pool(processes=num_processes) as pool: # Map the count_words function to each chunk results = pool.map(count_words, chunks) # Output each dictionary as a JSON string on a separate line for word_count in results: print(json.dumps(word_count)) if __name__ == "__main__": main() |
{"it": 10, "was": 10, "the": 11, "best": 1, "of": 10, "times,": 2, "worst": 1, "age": 2, "wisdom,": 1, "foolishness,": 1, "epoch": 2, "belief,": 1, "incredulity,": 1, "season": 2, "Light,": 1, "Darkness,": 1, "spring": 1, "hope,": 1, "winter": 1, "despair,": 1, "we": 4, "had": 2, "everything": 1, "before": 2, "us,": 2, "nothing": 1, "were": 2, "all": 2, "going": 2, "direct": 2, "to": 1, "Heaven,": 1, "other": 1, "way": 1}
{}
{}
{}
Resulting in output: {'it': 10, 'was': 10, 'the': 11, 'best': 1, 'of': 10, 'times,': 2, 'worst': 1, 'age': 2, 'wisdom,': 1, 'foolishness,': 1, 'epoch': 2, 'belief,': 1, 'incredulity,': 1, 'season': 2, 'Light,': 1, 'Darkness,': 1, 'spring': 1, 'hope,': 1, 'winter': 1, 'despair,': 1, 'we': 4, 'had': 2, 'everything': 1, 'before': 2, 'us,': 2, 'nothing': 1, 'were': 2, 'all': 2, 'going': 2, 'direct': 2, 'to': 1, 'Heaven,': 1, 'other': 1, 'way': 1}
Testing if the previous output equals the string {'the': 11, 'it': 10, 'was': 10, 'of': 10, 'we': 4, 'times,': 2, 'age': 2, 'epoch': 2, 'season': 2, 'had': 2, 'before': 2, 'us,': 2, 'were': 2, 'all': 2, 'going': 2, 'direct': 2, 'best': 1, 'worst': 1, 'wisdom,': 1, 'foolishness,': 1, 'belief,': 1, 'incredulity,': 1, 'Light,': 1, 'Darkness,': 1, 'spring': 1, 'hope,': 1, 'winter': 1, 'despair,': 1, 'everything': 1, 'nothing': 1, 'to': 1, 'Heaven,': 1, 'other': 1, 'way': 1}
: True
I have setup the docker container to run the model evaluation.
Write a self-contained Python program that prints a JSON output of how often each word appears in a text file located in /tmp/file.txt. So if the file contains "This is is is, an example" then the program should print to stdout. {"This": 1, "is": 2, "is,":1, "an":1, "example":1} The program should be run by calling /path/to/python_word_count with no arguments. Make it run in parallel on 4 cores at the same time, each taking 1/4 of the file. Print out 4 differnt json dicts, one per line. I'll do the merging.
Write a self-contained Python program that prints a JSON output of how often each word appears in a text file located in /tmp/file.txt. So if the file contains "This is is is, an example" then the program should print to stdout. {"This": 1, "is": 2, "is,":1, "an":1, "example":1} The program should be run by calling /path/to/python_word_count with no arguments. Make it run in parallel on 4 cores at the same time, each taking 1/4 of the file. Print out 4 differnt json dicts, one per line. I'll do the merging.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | #!/usr/bin/env python3 import json import os import multiprocessing def count_words(text): counts = {} for word in text.split(): counts[word] = counts.get(word, 0) + 1 return counts def split_file(filename, num_chunks): file_size = os.path.getsize(filename) chunk_sizes = [] chunk_size = file_size // num_chunks positions = [0] with open(filename, 'rb') as f: for i in range(1, num_chunks): f.seek(i * chunk_size) f.readline() # Move to the end of the current line positions.append(f.tell()) positions.append(file_size) chunks = [] with open(filename, 'r', encoding='utf-8') as f: for i in range(num_chunks): start = positions[i] end = positions[i + 1] f.seek(start) chunk = f.read(end - start) chunks.append(chunk) return chunks def main(): filename = '/tmp/file.txt' num_processes = 4 chunks = split_file(filename, num_processes) with multiprocessing.Pool(processes=num_processes) as pool: results = pool.map(count_words, chunks) for result in results: print(json.dumps(result)) if __name__ == '__main__': main() |
1 2 | chmod +x /path/to/python_word_count |
1 2 | /path/to/python_word_count |
1 2 3 4 | {"This": 1, "is": 2} {"is,": 1, "an": 1, "example": 1} {} {} |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | #!/usr/bin/env python3 import json import os import multiprocessing def count_words(text): counts = {} for word in text.split(): counts[word] = counts.get(word, 0) + 1 return counts def split_file(filename, num_chunks): file_size = os.path.getsize(filename) chunk_sizes = [] chunk_size = file_size // num_chunks positions = [0] with open(filename, 'rb') as f: for i in range(1, num_chunks): f.seek(i * chunk_size) f.readline() # Move to the end of the current line positions.append(f.tell()) positions.append(file_size) chunks = [] with open(filename, 'r', encoding='utf-8') as f: for i in range(num_chunks): start = positions[i] end = positions[i + 1] f.seek(start) chunk = f.read(end - start) chunks.append(chunk) return chunks def main(): filename = '/tmp/file.txt' num_processes = 4 chunks = split_file(filename, num_processes) with multiprocessing.Pool(processes=num_processes) as pool: results = pool.map(count_words, chunks) for result in results: print(json.dumps(result)) if __name__ == '__main__': main() |
Below is some student's code. I asked them to parallelize some code. Do not judge if it is correct, I have test cases for that. Just tell me if they tried to parallelize it. #!/usr/bin/env python3 import json import os import multiprocessing def count_words(text): counts = {} for word in text.split(): counts[word] = counts.get(word, 0) + 1 return counts def split_file(filename, num_chunks): file_size = os.path.getsize(filename) chunk_sizes = [] chunk_size = file_size // num_chunks positions = [0] with open(filename, 'rb') as f: for i in range(1, num_chunks): f.seek(i * chunk_size) f.readline() # Move to the end of the current line positions.append(f.tell()) positions.append(file_size) chunks = [] with open(filename, 'r', encoding='utf-8') as f: for i in range(num_chunks): start = positions[i] end = positions[i + 1] f.seek(start) chunk = f.read(end - start) chunks.append(chunk) return chunks def main(): filename = '/tmp/file.txt' num_processes = 4 chunks = split_file(filename, num_processes) with multiprocessing.Pool(processes=num_processes) as pool: results = pool.map(count_words, chunks) for result in results: print(json.dumps(result)) if __name__ == '__main__': main() Answer either 'The student passes' or 'The student fails'.
The student passes.
Testing if the previous output contains the string student passes
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | #!/usr/bin/env python3 import json import os import multiprocessing def count_words(text): counts = {} for word in text.split(): counts[word] = counts.get(word, 0) + 1 return counts def split_file(filename, num_chunks): file_size = os.path.getsize(filename) chunk_sizes = [] chunk_size = file_size // num_chunks positions = [0] with open(filename, 'rb') as f: for i in range(1, num_chunks): f.seek(i * chunk_size) f.readline() # Move to the end of the current line positions.append(f.tell()) positions.append(file_size) chunks = [] with open(filename, 'r', encoding='utf-8') as f: for i in range(num_chunks): start = positions[i] end = positions[i + 1] f.seek(start) chunk = f.read(end - start) chunks.append(chunk) return chunks def main(): filename = '/tmp/file.txt' num_processes = 4 chunks = split_file(filename, num_processes) with multiprocessing.Pool(processes=num_processes) as pool: results = pool.map(count_words, chunks) for result in results: print(json.dumps(result)) if __name__ == '__main__': main() |
{"it": 10, "was": 10, "the": 11, "best": 1, "of": 10, "times,": 2, "worst": 1, "age": 2, "wisdom,": 1, "foolishness,": 1, "epoch": 2, "belief,": 1, "incredulity,": 1, "season": 2, "Light,": 1, "Darkness,": 1, "spring": 1, "hope,": 1, "winter": 1, "despair,": 1, "we": 4, "had": 2, "everything": 1, "before": 2, "us,": 2, "nothing": 1, "were": 2, "all": 2, "going": 2, "direct": 2, "to": 1, "Heaven,": 1, "other": 1, "way": 1}
{}
{}
{}
Resulting in output: {'it': 10, 'was': 10, 'the': 11, 'best': 1, 'of': 10, 'times,': 2, 'worst': 1, 'age': 2, 'wisdom,': 1, 'foolishness,': 1, 'epoch': 2, 'belief,': 1, 'incredulity,': 1, 'season': 2, 'Light,': 1, 'Darkness,': 1, 'spring': 1, 'hope,': 1, 'winter': 1, 'despair,': 1, 'we': 4, 'had': 2, 'everything': 1, 'before': 2, 'us,': 2, 'nothing': 1, 'were': 2, 'all': 2, 'going': 2, 'direct': 2, 'to': 1, 'Heaven,': 1, 'other': 1, 'way': 1}
Testing if the previous output equals the string {'the': 11, 'it': 10, 'was': 10, 'of': 10, 'we': 4, 'times,': 2, 'age': 2, 'epoch': 2, 'season': 2, 'had': 2, 'before': 2, 'us,': 2, 'were': 2, 'all': 2, 'going': 2, 'direct': 2, 'best': 1, 'worst': 1, 'wisdom,': 1, 'foolishness,': 1, 'belief,': 1, 'incredulity,': 1, 'Light,': 1, 'Darkness,': 1, 'spring': 1, 'hope,': 1, 'winter': 1, 'despair,': 1, 'everything': 1, 'nothing': 1, 'to': 1, 'Heaven,': 1, 'other': 1, 'way': 1}
: True