List_comprehensions.ipynb

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   "source": [
    "# List Comprehensions"
   ]
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     "text": [
      "['New York City', 'Mountain View', 'Chicago', 'Los Angeles']\n"
     ]
    }
   ],
   "source": [
    "# Given a list of cities\n",
    "cities = ['new york city', 'mountain view', 'chicago', 'los angeles']\n",
    "\n",
    "# Create a new list with capitalized versions of the city names\n",
    "capitalized_cities = [city.title() for city in cities]\n",
    "\n",
    "# Print the capitalized city names\n",
    "print(capitalized_cities)"
   ]
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   "source": [
    "## Example with conditions also."
   ]
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     "text": [
      "[0, 1, 4, 9, 16, 25, 36, 49, 64]\n",
      "[0, 1, 4, 9, 16, 25, 36, 49, 64]\n",
      "[0, 4, 16, 36, 64]\n",
      "[0, 4, 4, 6, 16, 8, 36, 10, 64]\n"
     ]
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   "source": [
    "# Not List Comprehension\n",
    "squares = []\n",
    "for x in range(9):\n",
    "    squares.append(x**2)\n",
    "print(squares)\n",
    "\n",
    "# List Comprehension\n",
    "squares = [x**2 for x in range(9)]\n",
    "print(squares)\n",
    "\n",
    "# squares of only even numbers.\n",
    "squares = [x**2 for x in range(9) if x%2==0]\n",
    "print(squares)\n",
    "\n",
    "# another one :)\n",
    "squares = [x**2 if x%2==0 else x + 3 for x in range(9) ]\n",
    "print(squares)"
   ]
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   "cell_type": "markdown",
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   "source": [
    "### List Comprehensions are very cool tool provided from python because we can create lists really quickly and concisely."
   ]
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   "source": [
    "## 1) Extract First Name"
   ]
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     "text": [
      "['rick', 'morthy', 'summer', 'jerry', 'beth']\n"
     ]
    }
   ],
   "source": [
    "# Given a list of full names\n",
    "names = ['Rick Sanchez', 'Morthy Smith', 'Summer Smith', 'Jerry Smith', 'Beth Smith']\n",
    "\n",
    "# Extract the first names (lowercased) from the full names\n",
    "first_names = [name.split()[0].lower() for name in names]\n",
    "\n",
    "# Print the resulting list of first names\n",
    "print(first_names)"
   ]
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   "source": [
    "## 2) Multiples of Three (3)"
   ]
  },
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     "text": [
      "[3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60]\n"
     ]
    }
   ],
   "source": [
    "# Create a list of multiples of 3\n",
    "multiplier_3 = [x * 3 for x in range(1, 21)]\n",
    "\n",
    "# Print the resulting list\n",
    "print(multiplier_3)"
   ]
  },
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   "source": [
    "## 3) Filter names by zero"
   ]
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     "text": [
      "['Rick Sanchez', 'Summer Smith', 'Beth Smith']\n"
     ]
    }
   ],
   "source": [
    "# Given a dictionary of student scores\n",
    "scores = {'Rick Sanchez': 70, 'Morthy Smith': 35, 'Summer Smith': 82, 'Jerry Smith': 23, 'Beth Smith': 98}\n",
    "\n",
    "# Create a list of names for students who passed (score >= 65)\n",
    "passed = [name for name, score in scores.items() if score >= 65]\n",
    "\n",
    "# Print the list of passed students\n",
    "print(passed)"
   ]
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     "text": [
      "Selected Jupyter core packages...\n",
      "IPython          : 8.25.0\n",
      "ipykernel        : 6.28.0\n",
      "ipywidgets       : 8.1.2\n",
      "jupyter_client   : 8.6.0\n",
      "jupyter_core     : 5.5.0\n",
      "jupyter_server   : 2.10.0\n",
      "jupyterlab       : 4.2.3\n",
      "nbclient         : 0.8.0\n",
      "nbconvert        : 7.10.0\n",
      "nbformat         : 5.9.2\n",
      "notebook         : 7.2.1\n",
      "qtconsole        : 5.5.1\n",
      "traitlets        : 5.14.3\n"
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    "!jupyter --version"
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