Manav Narula

2. Author
3. Manav Narula

Python Pandas Howtos

1. Convert JSON to a Pandas DataFrame
2. Apply a Function to Multiple Columns in Pandas DataFrame
3. Get Pandas Unique Values in Column and Sort Them
4. Merge Pandas DataFrames on Index
5. Create Pandas Dataframe From a List
6. Select Multiple Columns in Pandas Dataframe
7. Set Columns as Index in Pandas Dataframe
8. Chunksize in Pandas
9. Pandas read_sql_query in Python
10. Read HDF5 Files Into Pandas DataFrame
11. Convert Object to Float in Pandas
12. Convert Pandas DataFrame to JSON
13. Drop Columns by Index in Pandas DataFrame
14. Iterate Through Columns of a Pandas DataFrame
15. Subtract Two Columns of a Pandas DataFrame
16. Convert Pandas to CSV Without Index
17. Convert Pandas Dataframe to Dictionary
18. Pandas Append to CSV
19. Show All Columns of a Pandas DataFrame
20. Take Column-Slices of DataFrame in Pandas

Python How-To's

1. Ellipsis Object in Python
2. Find Prime Factors in Python
3. Query String With Params for Requests in Python
4. Sort List of Dictionaries in Python
5. Unpack Operator ** in Python
6. Wait 5 Seconds in Python
7. The with Statement in Python
8. WebDriverException: Message: Geckodriver Executable Needs to Be in PATH Error in Python
9. SyntaxError: Invalid Syntax When Using Command Line in Python
10. OverflowError: Math Range Error in Python
11. Fix the SyntaxError: 'break' Outside Loop Error in Python
12. Fix the TypeError: Can Only Join an Iterable in Python
13. Python OverflowError: Python Int Too Large to Convert to C Long
14. Python SyntaxError: Can't Assign to Literal Error in Python
15. Python TypeError: Missing 1 Required Positional Argument
16. IDLE's Subprocess Didn't Make Connection Error in Python
17. Fix the Can't Open File 'manage.py': [Errno 2] No Such File or Directory Error in Python
18. Solve the ValueError: Zero Length Field Name in Format Error in Python
19. IO.UnsupportedOperation: Not Writable Error in Python
20. TypeError: Unhashable Type: Slice in Python
21. Error: Can't Find Python Executable Python, You Can Set the PYTHON Env Variable
22. ImportError: Cannot Import Name _Remove_dead_weakref in Python
23. SIFT Using OpenCV in Python
24. GUI Features of OpenCV in Python
25. Create a QR Code Scanner Using OpenCV in Python
26. Show an Image Using OpenCV in Python
27. Image Moments Using OpenCV in Python
28. Template Matching Using OpenCV in Python
29. OpenCV sobel() Function
30. Image Segmentation in OpenCV
31. The HSV Color Space Using OpenCV in Python
32. The imwrite() Function of OpenCV
33. Object Tracking Using OpenCV
34. Kalman Filter Using OpenCV in Python
35. Image Color Detection Using OpenCV in Python
36. Use the OpenCV solvepnp() Function to Solve the PnP Problem
37. Install OpenCV in Python
38. OpenCV Canny in Python
39. OpenCV Threshold
40. OpenCV-contrib Module in Python
41. Use the imshow() Function From OpenCV in Python
42. Create a Keylogger in Python
43. Print With Column Alignment in Python
44. Click Button With Selenium in Python
45. Find Elements With Selenium in Python
46. Implicit Wait With Selenium in Python
47. Screenshot With Selenium in Python
48. Select Options From Dropdown Menu With Selenium in Python
49. Create an Auto Clicker in Python
50. Downgrade Python Version
51. Create Turtle Graphics in Python
52. Find the Index of the Maximum Element in a List in Python
53. Polymorphism in Python
54. Create a Port Scanner in Python
55. Implement Min Heap in Python
56. Convert XLSX to CSV File in Python
57. Union-Find Algorithm in Python
58. Download CSV From URL in Python
59. Calculate the Sum of Digits in Python
60. Check if a Set Is a Subset of Another Set in Python
61. Find Index of Minimum Element in a List in Python
62. Lasso Regression in Python
63. Implement the Snmpwalk Utility in Python
64. Implement a Touch File in Python
65. Inverse of Matrix in Python
66. Python Program Closes Immediately
67. Sample With Replacement in Python
68. Subprocess.check_output in Python
69. Create an IRC Bot in Python 3
70. K-Fold Cross-Validation in Python
71. List vs. Dictionary in Python
72. Pillow Package in Python
73. Property Decorator in Python
74. Use SCP Protocol in Python
75. Class Methods in Python
76. Events in Python
77. Graphs Data Structure in Python
78. Buffer in Python
79. Pointers in Python
80. Mixin Classes in Python
81. Kwargs in Python
82. Sieve of Eratosthenes in Python
83. Daemon Threads in Python
84. The Walrus Operator := in Python
85. Binomial Distribution in Python
86. Order of Operations in Python
87. Fix Float Object Is Not Callable in Python
88. Fix Python Is Not Recognized as an Internal or External Command Error in Python
89. Convert List to Comma-Separated String in Python
90. Get Web Page in Python
91. Change Python Version in PyCharm
92. Fix Bytes-Like Object Is Required Not STR Error in Python
93. Fix Object Has No Attribute Error in Python
94. Fix STR Has No Attribute Decode Error in Python
95. Fix Keywords Cannot Be Expression Error in Python
96. Fix String Indices Must Be Integers Error in Python
97. Fix TypeError: Not Enough Arguments for Format String Error in Python
98. Fix Missing Parentheses in Print Error in Python
99. Crop Image Using OpenCV in Python
100. Join Threads in Python
101. Singleton Design Pattern in Python
102. Using pydoc in Python
103. Install SQLite in Python
104. Unindent Code in Python
105. Difference Between Multiprocessing and Threading in Python
106. Command-Line Arguments in Python
107. Permutations of a String in Python
108. Save HTML as PDF in Python
109. Solve Tower of Hanoi Probelem in Python
110. Split String in Half in Python
111. Convert Text to Speech in Python
112. Nested Functions in Python
113. The for...else Statement in Python
114. Moving Average for NumPy Array in Python
115. Resize Image in Python
116. Change Python Path
117. Check Python Module Version
118. Check Variable Is String or Not in Python
119. Generate Random Colors in Python
120. Get Values of Dictionary in Python
121. Print Blank Line in Python
122. Read Matlab mat Files in Python
123. Catch All Exceptions in Python
124. Convert Radians to Degrees and Vice-Versa in Python
125. Dictionary Comprehension in Python
126. Find Character in a String in Python
127. List of Numbers From 1 to N in Python
128. Sort With Lambda in Python
129. GREP in Python
130. Multiple Exceptions in Python
131. Print Matrix in Python
132. Replace Character in a String in Python
133. Run Python Script in Terminal
134. SSH Using Python
135. Check if Input Is Integer in Python
136. Check if Variable Is Integer Python
137. Compare Lists in Python
138. Convert NumPy Array to List in Python
139. do while Loop in Python
140. Generate Random Integers in Range in Python
141. Print Data in Tabular Format in Python
142. Progress Bar in Python
143. Python Dictionary Index
144. Read File to a String in Python
145. tostring() Equivalent in Python
146. Where Is Python Installed
147. Call External Program in Python
148. Apply a Function to a List in Python
149. Disable Path Length Limit in Python
150. Fibonacci Sequence in Python
151. String Builder Equivalent in Python
152. String to Hex in Python
153. Compare Strings in Python
154. Convert Dictionary to Tuples in Python
155. Convert Hexadecimal to Decimal in Python
156. Create List of Lists in Python
157. Print List Without Square Brackets in Python
158. Reload or Unimport Module in Python
159. Check for NaN Values in Python
160. Create List of Zeros in Python
161. Display an Image in Python
162. Find Median of a List in Python
163. Get the String Length and Size in Python
164. Inline if...else Statement in Python
165. Return Multiple Values From a Function in Python
166. Split String to Char Array in Python
167. Square Root in Python
168. Check Element Not in a List in Python
169. Check List Is Empty in Python
170. if not Statement in Python
171. JSON to CSV in Python
172. Get Path of the Current File in Python
173. Scientific Notation in Python
174. Find All the Indices of an Element in a List in Python
175. Find String in List in Python
176. Sort a List Alphabetically in Python
177. Clear a File in Python
178. Convert Binary to Int in Python
179. Count Number of Keys in Dictionary Python
180. Convert DateTime to String With Milliseconds in Python
181. Write Bytes to a File in Python
182. Enumerate Dictionary in Python
183. Nested Dictionary in Python
184. Nested Class in Python
185. Read Binary File in Python
186. Read First Line of a File in Python
187. Sum Dictionary Values in Python
188. Pdfminer Package in Python
189. The maketrans Function in Python
190. Round to Two Decimals in Python

Python Matplotlib Howto's

1. Plot Vectors Using Python Matplotlib
2. Display Greek Letters in Python Matplotlib
3. Matplotlib Colorbar Range
4. Matplotlib Legend Title
5. Show Colorbar in Matplotlib

Seaborn Howto's

1. Seaborn BoxPlot
2. Seaborn Swarmplot
3. Set Size of Seaborn Heatmap
4. Transparency of Seaborn Plots
5. Catplot in Seaborn
6. Conda Install Seaborn
7. Correlation Heatmap in Seaborn
8. FacetGrid in Seaborn
9. Install Seaborn With Pip in Python
10. Pairplot Seaborn in Python
11. Remove Legend From Seaborn Plots in Python
12. Reverse Log Scale in Seaborn Plots
13. Set Axis Ticks in Seaborn Plots
14. Set Marker Size in Seaborn Scatterplots
15. Set the Background Color of Seaborn Plots
16. Solve the Problem of Seaborn Plots Not Showing
17. Violin Plot Using Seaborn
18. Change Location of Legend in Seaborn Plot
19. Multiple Seaborn Plots
20. Plot the Graph Using the seaborn.lmplot() Function
21. Plot Time Series Data in Seaborn
22. Seaborn Set_xticklabels Function
23. Seaborn Subplots
24. Seaborn tsplot() in Python
25. Rotate Axis Tick Labels of Seaborn Plots
26. Add Axis Labels to Seaborn Plot
27. Add Title to Seaborn Plot
28. Change Seaborn Plot Size
29. Font Size in Seaborn Plot
30. Legend in Seaborn Plot
31. Save Seaborn Figure in Python
32. Seaborn Bar and Stacked Bar Plots
33. Seaborn Line Plots

Python NumPy Howtos

1. Check if NumPy Module Is Installed in Python
2. Cosine of Degree Values in NumPy
3. Curve Curvature in Python
4. Imaginary Numbers in NumPy Arrays
5. Sum of Columns of a Matrix in NumPy
6. Vector Addition in NumPy
7. Add Row to Matrix in NumPy
8. Convert Matrix to Array in NumPy
9. One-Hot Encoding on NumPy Array in Python
10. Save NumPy Array as Image in Python
11. Calculate Euclidean Distance in Python
12. Check NumPy Version in Python
13. Find the First Index of Element in NumPy Array
14. Read NumPy Array to CSV in Python
15. Write NumPy Array to CSV in Python
16. NumPy dot vs matmul in Python
17. Normalize a Vector in Python
18. List to NumPy Array in Python
19. NumPy mean() vs average()

Python Numpy Functions

1. Python Numpy.pad Function

R Howtos

1. Apply Function With Multiple Arguments in R
2. Change Point Size in Graphs in R
3. Label BoxPlot in R
4. Remove Last Character From String in R
5. Calculate Standard Error in R
6. Count Number of Observations in R
7. Find Index of an Element in a R Vector
8. The replicate() Function in R
9. Tilde Symbol (~) in R
10. Check the Version of R
11. Use the diff Function in R
12. ylim() and xlim() in R
13. Count Number of Rows in R
14. Create Empty Vector in R
15. Create Stacked Histogram in R
16. E in R
17. Natural Logarithm in R
18. Set Thickness of Plots in R