{
"metadata": {
"name": "",
"signature": "sha256:3323f7a9a077b84fffdd30478d4b0d0b7f4032b86670a58b5b333d42bee04f15"
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"worksheets": [
{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h1>Chapter 10: Strings<h1> "
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.3, Page Number: 10.3<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"st='Programming'\n",
"print 'The string is %s' %st"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The string is Programming\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.4, Page Number: 10.4<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"st='Hello World'\n",
"print 'The line is :'\n",
"print st"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The line is :\n",
"Hello World\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.6, Page Number: 10.5<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"\n",
"strin='Welcome to python'\n",
"for i in strin:\n",
" print i,"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"W e l c o m e t o p y t h o n\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.7, Page Number: 10.6<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"\n",
"str1='Programming'\n",
"len1=len(str1)\n",
"print 'The length of the string is ',len1\n",
"\n",
"str2=str1\n",
"print 'First string is %s and copied string is %s' %(str1,str2)\n",
"\n",
"str3='Computer'\n",
"\n",
"if str1==str3:\n",
" print 'Both strings are equal'\n",
"elif str1<str2:\n",
" print 'First string is lesser than second string'\n",
"else:\n",
" print 'First string is greater than second string'\n",
" \n",
"tempstr=' with C'\n",
"str1=str1+tempstr\n",
"print 'The concated string is ',str1\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The length of the string is 11\n",
"First string is Programming and copied string is Programming\n",
"First string is greater than second string\n",
"The concated string is Programming with C\n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.8,Page Number: 10.7<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"def strlength(str1):\n",
" count=0\n",
" for i in str1:\n",
" count+=1\n",
" \n",
" return count\n",
"def strcopy(src):\n",
" dst=[]\n",
" for i in src:\n",
" dst.append(i)\n",
" \n",
" dst=''.join(dst)\n",
" \n",
" return dst\n",
"\n",
"\n",
"str1='New Delhi'\n",
"len1=strlength(str1)\n",
"print 'The length of the string is ',len1\n",
"\n",
"str2=strcopy(str1)\n",
"print 'First string is %s and copied string is %s' %(str1,str2)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The length of the string is 9\n",
"First string is New Delhi and copied string is New Delhi\n"
]
}
],
"prompt_number": 8
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.9,Page Number: 10.9<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"\n",
"def strcompare(str1,str2):\n",
" \n",
" len1=len(str1)\n",
" len2=len(str2)\n",
" \n",
" if len1<len2:\n",
" length=len1\n",
" else:\n",
" length=len2\n",
" \n",
" for i in xrange(0,length):\n",
" if str1[i]<str2[i]:\n",
" return -1\n",
" elif str1[i]>str2[i]:\n",
" return 1\n",
" \n",
" return 0\n",
"\n",
"str1='Programming'\n",
"str2='Computer'\n",
"status=strcompare(str1,str2)\n",
"if status==-1:\n",
" print 'First string is lesser than second string'\n",
"elif status==1:\n",
" print 'First string is greater than second string'\n",
"else:\n",
" print 'Both strings ae equal'\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"First string is greater than second string\n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.10, Page Number: 10.10<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"def leftconcat(dst,src):\n",
" dst=src+dst\n",
" return dst\n",
"\n",
"def rightconcat(dst,src):\n",
" dst=dst+src\n",
" return dst\n",
"\n",
"str1='Hello'\n",
"str2='Friends'\n",
"\n",
"tempstr=leftconcat(str2,str1)\n",
"print 'The first string after left concatenation becomes ', tempstr\n",
"\n",
"tempstr=rightconcat(str2,str1)\n",
"print 'The first string after right concatenation becomes', tempstr\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The first string after left concatenation becomes HelloFriends\n",
"The first string after right concatenation becomes FriendsHello\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.11,Page Numbr: 10.12<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"\n",
"str1='All good boys have bread'\n",
"count=0\n",
"\n",
"for i in str1:\n",
" if i=='a' or i=='e'or i=='i' or i=='o' or i=='u' or i=='A' or i=='E' or i=='I' or i=='O' or i=='U' :\n",
" count+=1\n",
" \n",
"print 'Total number of vowels in a given text are ',count"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Total number of vowels in a given text are 8\n"
]
}
],
"prompt_number": 11
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.12, Page Number: 10.13<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"ch1='A'\n",
"ch2=ord(ch1)+3\n",
"print chr(ch2)\n",
"\n",
"ch1=chr(ord(ch1)+1)\n",
"print ch1\n",
"\n",
"print ord('a')\n",
"print ord('l')\n",
"\n",
"val=ord(ch1)*ch2\n",
"print val\n",
"\n",
"print chr(100)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"D\n",
"B\n",
"97\n",
"108\n",
"4488\n",
"d\n"
]
}
],
"prompt_number": 12
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.13, Page Number: 10.13<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"text='I am studying 6 Theory Papers & 4 practicals'\n",
"\n",
"len1=len(text)\n",
"text=list(text)\n",
"for i in xrange(0,len1):\n",
" if text[i]>='a' and text[i]<='z':\n",
" text[i]=chr(ord(text[i])+ord('A')-ord('a'))\n",
" \n",
" \n",
"text=''.join(text)\n",
"\n",
"print 'The text after converting lowercase alphabets to uppercase is '\n",
"print text"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The text after converting lowercase alphabets to uppercase is \n",
"I AM STUDYING 6 THEORY PAPERS & 4 PRACTICALS\n"
]
}
],
"prompt_number": 13
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.14, Page Number: 10.14<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"text='The programming is a systematic process'\n",
"substr='pro'\n",
"text_len=len(text)\n",
"sub_len=len(substr)\n",
"text=list(text)\n",
"substr=list(substr)\n",
"\n",
"for i in xrange(0,text_len-sub_len+1):\n",
" \n",
" for j in xrange(0,sub_len):\n",
" \n",
" if text[i+j]==substr[j]:\n",
" continue\n",
" else:\n",
" break\n",
" \n",
" if j==sub_len-1:\n",
" print 'The substring is present from subscript %d onwards' %i\n",
" \n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The substring is present from subscript 4 onwards\n",
"The substring is present from subscript 32 onwards\n"
]
}
],
"prompt_number": 14
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 10.15,Page number: 10.15<h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"\n",
"def reorder(x):\n",
"\n",
" n=len(x)\n",
" for item in range(0,n-1):\n",
" for i in range(item+1,n):\n",
" if x[item]>x[i]:\n",
" temp=x[item]\n",
" x[item]=x[i]\n",
" x[i]=temp\n",
"\n",
"\n",
" return\n",
"\n",
"x=['PACIFIC','ATLANTIC','INDIAN','CARIBBEAN','BERING','BLACK','RED','NORTH','BALTIC','CASPIAN']\n",
"print 'Original list of strings :\\n\\n'\n",
"\n",
"for i in x:\n",
" print \"String : \",i\n",
"\n",
"reorder(x)\n",
"\n",
"print \"\\nReodered list of strings : \\n\\n\"\n",
"\n",
"for i in x:\n",
" print \"String : \",i\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Original list of strings :\n",
"\n",
"\n",
"String : PACIFIC\n",
"String : ATLANTIC\n",
"String : INDIAN\n",
"String : CARIBBEAN\n",
"String : BERING\n",
"String : BLACK\n",
"String : RED\n",
"String : NORTH\n",
"String : BALTIC\n",
"String : CASPIAN\n",
"\n",
"Reodered list of strings : \n",
"\n",
"\n",
"String : ATLANTIC\n",
"String : BALTIC\n",
"String : BERING\n",
"String : BLACK\n",
"String : CARIBBEAN\n",
"String : CASPIAN\n",
"String : INDIAN\n",
"String : NORTH\n",
"String : PACIFIC\n",
"String : RED\n"
]
}
],
"prompt_number": 15
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 15
}
],
"metadata": {}
}
]
}