[
  {
    "url": "https://docs.python.org/3/library/stdtypes.html#string-methods",
    "description": "string methods"
  },
  {
    "url": "https://docs.python.org/3/library/stdtypes.html#common-sequence-operations",
    "description": "common sequence operations"
  },
  {
    "url": "https://realpython.com/python-strings/",
    "description": "strings and character data in Python"
  },
  {
    "url": "https://www.programiz.com/python-programming/string",
    "description": "more string operations and functions"
  }
]