Python: create dictionary using dict() with integer keys?

Python: create dictionary using dict() with integer keys?

You can create a dictionary using the dict() constructor with integer keys in Python. Here's how you can do it:

integer_dict = dict([(1, 'one'), (2, 'two'), (3, 'three')]) print(integer_dict)

In this example, the dictionary is created using a list of tuples where each tuple contains an integer key and its corresponding value. The dict() constructor then converts the list of tuples into a dictionary.

You can access the values in the dictionary using integer keys:

print(integer_dict[1]) # Output: 'one' print(integer_dict[2]) # Output: 'two' print(integer_dict[3]) # Output: 'three'

Make sure to adjust the keys and values according to your requirements.

Examples

  1. Query: "Python: How to create a dictionary from a text string that looks like a dictionary?"

    • Description: Convert a string representation of a dictionary into a Python dictionary using ast.literal_eval for safe evaluation.
    • Code:
      import ast # String in dictionary format dict_str = "{'name': 'Alice', 'age': 30, 'city': 'New York'}" # Convert to dictionary my_dict = ast.literal_eval(dict_str) print("Dictionary:", my_dict)

  2. Query: "Python: How to read a dictionary from a text file?"

    • Description: Read a text file containing a dictionary-like structure and convert it to a Python dictionary.
    • Code:
      import ast # Read the content from a file with open("dictionary.txt", "r") as file: dict_content = file.read() # Convert to dictionary my_dict = ast.literal_eval(dict_content) print("Dictionary from file:", my_dict)

  3. Query: "Python: How to create a dictionary from a JSON-formatted string?"

    • Description: Convert a JSON-formatted string into a Python dictionary using the json module.
    • Code:
      import json # JSON-formatted string json_str = '{"name": "Bob", "age": 25, "city": "Los Angeles"}' # Convert to dictionary my_dict = json.loads(json_str) print("Dictionary from JSON:", my_dict)

  4. Query: "Python: How to convert a CSV file to a dictionary?"

    • Description: Read a CSV file and convert it to a dictionary, with the first row as the dictionary keys.
    • Code:
      import csv # CSV file csv_file = "data.csv" # Read CSV into a list of dictionaries with open(csv_file, "r") as file: reader = csv.DictReader(file) data = list(reader) print("Dictionary from CSV:", data)

  5. Query: "Python: How to create a dictionary from a text file with key-value pairs?"

    • Description: Parse a text file with key-value pairs to create a dictionary.
    • Code:
      # Example text file content """ name=Charlie age=28 city=Chicago """ # Read the text file and convert it to a dictionary with open("key_value.txt", "r") as file: lines = file.readlines() my_dict = {line.split("=")[0]: line.split("=")[1].strip() for line in lines} print("Dictionary from key-value text:", my_dict)

  6. Query: "Python: How to create a dictionary from a YAML file?"

    • Description: Convert a YAML file into a Python dictionary using PyYAML.
    • Code:
      import yaml # Read the YAML file and convert it to a dictionary with open("config.yaml", "r") as file: my_dict = yaml.safe_load(file) print("Dictionary from YAML:", my_dict)

  7. Query: "Python: How to convert a dictionary to a JSON string?"

    • Description: Convert a Python dictionary into a JSON-formatted string.
    • Code:
      import json # Python dictionary my_dict = { "name": "David", "age": 35, "city": "Seattle" } # Convert to JSON string json_str = json.dumps(my_dict) print("JSON string:", json_str)

  8. Query: "Python: How to convert a text file into a dictionary with specific delimiters?"

    • Description: Parse a text file with custom delimiters to create a dictionary.
    • Code:
      # Example text file content """ username: admin password: secret """ # Read the text file and convert it to a dictionary with open("custom_delimiter.txt", "r") as file: lines = file.readlines() my_dict = {line.split(":")[0].strip(): line.split(":")[1].strip() for line in lines} print("Dictionary from custom delimiter text:", my_dict)

  9. Query: "Python: How to create a dictionary from a multi-line string?"

    • Description: Convert a multi-line string into a dictionary, treating each line as a key-value pair.
    • Code:
      # Multi-line string multi_line_str = """ key1=value1 key2=value2 key3=value3 """ # Convert to dictionary my_dict = {line.split("=")[0].strip(): line.split("=")[1].strip() for line in multi_line_str.splitlines() if "=" in line} print("Dictionary from multi-line string:", my_dict)

  10. Query: "Python: How to convert a JSON file to a dictionary?"

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