Python-Files-Data.ipynb

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    "# how to delete a file in Python\n",
    "\n",
    "`import os`  \n",
    "`os.remove(\"ChangedFile.csv\")`  \n",
    "`print(\"File Removed!\")`  "
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    "# Pandas\n",
    "- Pandas is an open-source, python-based library used in data manipulation applications requiring high performance. \n",
    "- Pandas are useful in performing 5 major steps of data analysis - Load the data, clean/manipulate it, prepare it, model it, and analyze the data.\n"
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    "`import pandas as pd`  \n",
    "`dataframe = pd.DataFrame( data, index, columns, dtype)`"
   ]
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   "source": [
    "# Reference\n",
    "- https://www.interviewbit.com/python-interview-questions/#use-of-self-in-python"
   ]
  },
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    "\n",
    "[3,2,4]\n",
    "6\n",
    "[3,3]\n",
    "6"
   ]
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     "text": [
      "[1, 2]\n"
     ]
    }
   ],
   "source": [
    "nums = [2,7,11,15]\n",
    "target = 9\n",
    "\n",
    "nums = [3,2,4]\n",
    "target = 6\n",
    "\n",
    "for i in range(0,len(nums)):\n",
    "    for j in range(i+1,len(nums)):\n",
    "        if (nums[i]+nums[j]==target):\n",
    "            print([i,j])\n",
    "            \n",
    "dict={}\n",
    "for index, ele in enumerate(nums):\n",
    "    if target- ele in dict:\n",
    "        return dict[target- ele], index\n",
    "    dict[ele]= index"
   ]
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     "text": [
      "Reversed List: [7, 5, 3, 2]\n"
     ]
    }
   ],
   "source": [
    "# create a list of prime numbers\n",
    "prime_numbers = [2, 3, 5, 7]\n",
    "\n",
    "# reverse the order of list elements\n",
    "prime_numbers.reverse()\n",
    "\n",
    "\n",
    "print('Reversed List:', prime_numbers)\n",
    "\n",
    "# Output: Reversed List: [7, 5, 3, 2]"
   ]
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     "text": [
      "True\n"
     ]
    }
   ],
   "source": [
    "txt = \"The best things in life are free!\"\n",
    "print(\"free\" in txt)"
   ]
  },
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