ursswag/StringMethods
0
1import streamlit as st2st.markdown("<h1 style='color:blue;'>String Master</h1>", unsafe_allow_html=True)3if st.button('Fundamentals of Strings'):4 st.markdown(''' **Strings** in python are surrounded by either single quotation marks, or double quotation marks.5 'hello' is the same as "hello".6 You can display a string literal with the 'print()' function:7 ''')8 st.markdown('''You can use quotes inside a string, as long as they don't match the quotes surrounding the string9 Assigning a string to a variable is done with the variable name followed by an equal sign and the string:''')10 example_code = '''11 # Example Code12a="It's Alright"13b="He is called 'Johnny'"14c='He is called "Johnny"'15print(a)16print(b)17print(c)18 19 20 '''21 22 st.code(example_code, language='python')23 24 a="It's alright"25 b="He is called 'Johnny'"26 c='He is called "Johnny"'27 28 st.write("Example Output:",a,b,c)29st.image("WhatsApp Image 2024-09-10 at 17.00.02_90a530ed.jpg")30method = st.selectbox("choose a string method",["Uppercase","Lowercase","Swapcase","Split","Splitlines","Strip","Count","Zfill","Startswith","Endswith","partition","join","isalpha","isnumeric","isalnum","expandtabs","center","replace","find","casefold"])31 32if st.button(f'click here to learn about {method}'):33 if method == "Uppercase":34 st.markdown("<h1 style='color:blue;'>Uppercase()</h1>", unsafe_allow_html=True)35 st.markdown('''36 ## uppercase() Method37 The upper() method returns a string where all characters are in upper case.38 Symbols and Numbers are ignored.39 ### Syntax40 'string.upper()'41 42 43 44 45 46 ''')47 ## **Example Code**48 example_code = '''49 # Example Code50 txt = "Hello my friends"51 x = txt.upper()52 print(x)53 '''54 55 st.code(example_code, language='python')56 57 58 txt = "Hello my friends"59 x = txt.upper()60 st.write("Example Output:", x)61 elif method == "Lowercase()":62 st.markdown("<h1 style='color:blue;'>Lowercase()</h1>", unsafe_allow_html=True)63 st.markdown('''64 ## Lowercase() Method65 The lower() method returns a string where all characters are lower case.Symbols and Numbers are ignored.66 ### Syntax67 'string.lower()'68 69 70 71 72 73 ''')74 ## **Example Code**75 example_code = '''76 # Example Code77 txt = "Hello my FRIENDS"78 79 x = txt.lower()80 81 print(x)82 83 '''84 85 st.code(example_code, language='python')86 87 88 txt = "Hello my FRIENDS"89 90 x = txt.lower()91 92 st.write("Example output:", x)93 elif method=='Swapcase':94 st.markdown("<h1 style='color:blue;'>Swapcase()</h1>", unsafe_allow_html=True)95 st.markdown('''96 ## Swapcase() Method97 98 The swapcase() method returns a string where all the upper case letters are lower case and vice versa.99 ### Syntax100 'string.swapcase()'101 ''')102 ## **Example Code**103 example_code='''104 # Example Code105 txt = "Hello My Name Is PETER"106 107 x = txt.swapcase()108 109 print(x)110 111 112 '''113 st.code(example_code, language='python')114 txt = "Hello My Name Is PETER"115 x = txt.swapcase()116 st.write("example output:", x)117 elif method == 'Split':118 st.markdown("<h1 style='color:blue;'>Split()</h1>", unsafe_allow_html=True)119 st.markdown('''120 ## Split() Method121 122 The split() method splits a string into a list.123 ### Syntax124 'string.split(separator, maxsplit)'125 ''')126 ## **Example Code**127 example_code = '''128 # Example Code129 txt = "Hello, my friends"130 x = txt.split(", ")131 print(x)132 '''133 st.code(example_code, language='python')134 txt = "Hello, my friends"135 x = txt.split(", ")136 st.write("Example Output:", x)137 elif method == 'Splitlines':138 st.markdown("<h1 style='color:blue;'>Splitlines()</h1>", unsafe_allow_html=True)139 st.markdown('''140 ## Splitlines() Method141 142 The splitlines() method splits a string into a list at line breaks.143 ### Syntax144 'string.splitlines(keepends)'145 ''')146 ## **Example Code**147 example_code = '''148 # Example Code149 txt = "Hello\\nmy friends"150 x = txt.splitlines()151 print(x)152 '''153 st.code(example_code, language='python')154 txt = "Hello\nmy friends"155 x = txt.splitlines()156 st.write("Example Output:", x)157 elif method == 'Strip':158 st.markdown("<h1 style='color:blue;'>Strip()</h1>", unsafe_allow_html=True)159 st.markdown('''160 ## Strip() Method161 162 The Strip() method removes any leading and trailing characters (space is the default).163 ### Syntax164 'string.strip(chars)'165 ''')166 ## **Example Code**167 example_code = '''168 # Example Code169 txt = " Hello my friends "170 x = txt.strip()171 print(x)172 '''173 st.code(example_code, language='python')174 txt = " Hello my friends "175 x = txt.strip()176 st.write("Example Output:", x)177 elif method == 'Count':178 st.markdown("<h1 style='color:blue;'>Count()</h1>", unsafe_allow_html=True)179 st.markdown('''180 ## Count() Method181 182 The count() method returns the number of times a specified value appears in the string.183 ### Syntax184 'string.count(value, start, end)'185 ''')186 ## **Example Code**187 example_code = '''188 # Example Code189 txt = "Hello my friends"190 x = txt.count("e")191 print(x)192 '''193 st.code(example_code, language='python')194 txt = "Hello my friends"195 x = txt.count("e")196 st.write("Example Output:", x)197 elif method == 'Zfill':198 st.markdown("<h1 style='color:blue;'Zfill()</h1>", unsafe_allow_html=True)199 st.markdown('''200 ## Zfill() Method201 202 The zfill() method adds zeros (0) at the beginning of the string, until it reaches the specified length.203 ### Syntax204 'string.zfill(length)'205 ''')206 ## **Example Code**207 example_code = '''208 # Example Code209 txt = "42"210 x = txt.zfill(5)211 print(x)212 '''213 st.code(example_code, language='python')214 txt = "42"215 x = txt.zfill(5)216 st.write("Example Output:", x)217 elif method == 'Startswith':218 st.markdown("<h1 style='color:blue;'>Startswith()</h1>", unsafe_allow_html=True)219 st.markdown('''220 ## Startswith() Method221 222 The startswith() method returns True if the string starts with the specified value, otherwise False.223 ### Syntax224 'string.startswith(value, start, end)'225 ''')226 ## **Example Code**227 example_code = '''228 # Example Code229 txt = "Hello my friends"230 x = txt.startswith("Hello")231 print(x)232 '''233 st.code(example_code, language='python')234 txt = "Hello my friends"235 x = txt.startswith("Hello")236 st.write("Example Output:", x)237 238 elif method == 'Endswith':239 st.markdown("<h1 style='color:blue;'>Endswith()</h1>", unsafe_allow_html=True)240 st.markdown('''241 ## Endswith() Method242 243 The endswith() method returns True if the string ends with the specified value, otherwise False.244 ### Syntax245 'string.endswith(value, start, end)'246 ''')247 ## **Example Code**248 example_code = '''249 # Example Code250 txt = "Hello my friends"251 x = txt.endswith("friends")252 print(x)253 '''254 st.code(example_code, language='python')255 txt = "Hello my friends"256 x = txt.endswith("friends")257 st.write("Example Output:", x)258 elif method == 'partition':259 st.markdown("<h1 style='color:blue;'>Partition()</h1>", unsafe_allow_html=True)260 st.markdown('''261 ## partition() Method262 263 The partition() method searches for a specified string and splits the string into a tuple containing three elements.264 ### Syntax265 'string.partition(value)'266 ''')267 ## **Example Code**268 example_code = '''269 # Example Code270 txt = "I could eat bananas all day"271 x = txt.partition("bananas")272 print(x)273 '''274 st.code(example_code, language='python')275 txt = "I could eat bananas all day"276 x = txt.partition("bananas")277 st.write("Example Output:", x)278 elif method == 'join':279 st.markdown("<h1 style='color:blue;'>Join()</h1>", unsafe_allow_html=True)280 st.markdown('''281 ## Join() Method282 283 The join() method takes all items in an iterable and joins them into one string.284 ### Syntax285 'separator.join(iterable)'286 ''')287 ## **Example Code**288 example_code = '''289 # Example Code290 my_list = ["John", "Peter", "Vicky"]291 x = ", ".join(my_list)292 print(x)293 '''294 st.code(example_code, language='python')295 my_list = ["John", "Peter", "Vicky"]296 x = ", ".join(my_list)297 st.write("Example Output:", x)298 elif method == 'find':299 st.markdown("<h1 style='color:blue;'>Find()</h1>", unsafe_allow_html=True)300 st.markdown('''301 ## find() Method302 303 The find() method finds the first occurrence of the specified value.304 ### Syntax305 'string.find(value, start, end)'306 ''')307 ## **Example Code**308 example_code = '''309 # Example Code310 txt = "Hello, welcome to my world."311 x = txt.find("welcome")312 print(x)313 '''314 st.code(example_code, language='python')315 txt = "Hello, welcome to my world."316 x = txt.find("welcome")317 st.write("Example Output:", x)318 319 elif method == 'find':320 st.markdown('''321 ## find() Method322 323 The find() method finds the first occurrence of the specified value.324 ### Syntax325 'string.find(value, start, end)'326 ''')327 ## **Example Code**328 example_code = '''329 # Example Code330 txt = "Hello, welcome to my world."331 x = txt.find("welcome")332 print(x)333 '''334 st.code(example_code, language='python')335 txt = "Hello, welcome to my world."336 x = txt.find("welcome")337 st.write("Example Output:", x)338 339 340import sys341import io342 343st.title("CODE Playground")344 345# Code input area for users to enter their Python code346code = st.text_area("Enter your Python code here:", height=200, value='''# # Hey coder, let's start with some string magic!''')347 348# Button to run the code349if st.button("Run Code"):350 # Redirect stdout to capture print statements351 old_stdout = sys.stdout352 new_stdout = io.StringIO()353 sys.stdout = new_stdout354 355 try:356 # Execute the user's code357 exec(code)358 359 # Get output360 output = new_stdout.getvalue()361 st.text_area("Output:", output, height=150)362 except Exception as e:363 # Handle any errors364 st.error(f"Error: {e}")365 366 # Reset stdout367 sys.stdout = old_stdout368