Python

The “len()” function, user-defined function, and “for” loop is used to count the number of keys in the Python dictionary.

To fix this error, various solutions are used, such as using the addition operator “+”, using the format() function, and calling append() function on the list.

To resolve the “list.remove(x): x not in list” error, check the element value before removing it, or use the try-except block to handle the stated error.

“function is not defined” error occurs in Python if the user tries to access the function before declaration or access the function without declaring it.

To print variable’s names, the “globals()” function, “items()” function, and “Python Dictionary” method are used in Python.

The “cv2.resize()” function is used to upscale or downscale the image. The width/height of the image can be resized separately by providing the constant value.

The “non-default argument follows default argument” error arises when a positional/non-default parameter in a function follows a default parameter of a function.

In Python, the “cv2.findContours()” is used to find the contours of a given image, and “cv2.drawContours()” is used to draw the contour on the image.

The “not all arguments converted during string formatting” error occurs when users use incorrect formatting syntax or the % operator with strings and numbers.

The “LookupError: unknown encoding” occurs in Python programs when a user tries to specify the unsupported encoding in a function.

The “ValueError: max() arg is an empty sequence” occurs when a user tries to pass an empty sequence as an argument of the max() function.

The “TypeError: unhashable type: dict” error occurs when a user tries to use the dictionary as a key for another dictionary in Python.

The “method object is not subscriptable” occurs when a user tries to call the method using a square bracket or incorrectly access the classes method.

The “ValueError: invalid literal for int() with base 10” occurs when a user tries to pass a non-numeric value, string value as an argument to int() function.

The “TypeError: unhashable type: list” occurs in Python when the user initializes the list as a key in a dictionary or uses the list as an item of a set.

The “ZeroDivisionError: float division by zero” occurs when a user tries to divide a floating point number by the value “0” in Python.

To round a float to “2” decimals, the “round()”, “math.ceil()”, “format()”, and “f-string” methods along with the “decimal” module are utilized in Python.

To print integer values, the “print()” function, “f-string” method, and “sys.stdout.write()” function of the “sys” module are used in Python.

The “simple division and multiplication operator” or the “user-defined function” are used in Python to calculate the percentage.

The “TypeError: expected string or bytes-like object” arises when we pass various data type values to a method that expects string type parameter value.

The “TypeError: tuple object does not support item assignment” occurs when the user tries to change the element/items value of a tuple in Python.

To solve the error “TypeError: str object is not callable”, remove the parentheses or rename the variable. All the reasons/solutions are explored in this post.

The “TypeError: module object is not callable” occurs when a user tries to call an imported module as a function or class in Python.

The “dict object is not callable” error occurs when a user calls “dict” as a function, overrides the “dict()” function, and incorrectly accesses dictionary keys.

The ModuleNotFoundError “no module named tensorflow” occurs when the user imports the “tensorflow” library in the program without installing it to the system.

The “ModuleNotFoundError: No mobile named sklearn” occurs when the user tries to import the “sklearn” module without installing it in Python.

The “ModuleNotFoundError: No module named pip” occurs in Python when the “pip” package manager is not installed in our system.

The “ModuleNotFoundError: No module named PIL” error occurs in Python when a user tries to import a “pillow” module without installing it in Python.

The “ModuleNotFoundError: No module named pandas” occurs when the user tries to access the “pandas” module without installing it in Python.

The “ModuleNotFoundError: no module named matplotlib” occurs in Python when a user tries to import the “matplotlib” module without installing it to a system.

To fix the error “ModuleNotFoundError: No module named requests”, install the “requests” module before importing it. Read out this post to learn more

In Python, the “Local variable referenced before assignment” occurs when you assign a value to a variable that does not have a local scope.

The “[Errno 2] No such file or directory” error occurs when the user tries to access the file that does not present at the particular location.

The error “builtin_function_or_method’ object is not subscriptable” occurs when a user tries to call the built-in method or function using a square bracket.

The error “NameError: name ‘raw_input’ is not defined” occurs when the “raw_input” function is used instead of using “input()” function in Python.

The “numpy.ndarray object is not callable” error occurs when the user tries to call an array as a function or uses the same name for a function and variable.

The “TypeError:’int’ object is not iterable” occurs if a user tries to iterate over an integer or pass an integer inside the iterable function, i.e., list().

The “int object is not callable” error occurs due to calling an integer as a function, overriding the int() function, missing a mathematical operator, etc.

The “AttributeError: NoneType object has no attribute append” occurs when a user tries to call an “append()” function on none value.

The “TypeError: object of type NoneType has no len()” occurs when the “None” value is passed to the “len()” function in Python.

The error “tuple object is not callable” occurs when a tuple is accessed incorrectly, calling the tuple as a function, overriding a tuple, etc

The “TypeError: int object is not subscriptable“ occurs in Python when the integer value is accessed using the index or the integer value is treated as a list.

The “TypeError: float object is not iterable” occurs if the float is passed within the built-in iterable function or the user tries to iterate over the float

The “is” and “is not” operators, “==” and “!=” operators, and “if-else” Statements are used to check the “Null/None” variable in Python.

The “list object is not callable” error occurs due to incorrect list accessing, calling list as a function, overriding list, and same name for function and list

Python’s “return” function has a “return” statement inside the function, and when executed, it sends back the value to the main program.

To calculate the power of a number “math.pow()” function is utilized in the Python program. It returns a value of base raised to a power of exponent

To calculate the exponent power of numeric value, the “math.exp()” function is used. It cannot be used with non-numeric values.

To find the index of the first occurrence of a substring in a string, the “str.index()” and “str.find()” functions are used in Python.

The “IndexError: list assignment index out of range” occurs when a value is added/assigned to an index that does not exist in the given list.

To delete column(s) of pandas DataFrame, the “drop()” function, “pop()” function, and the “del” keyword is used in Python.

To execute a specified function on each of the elements of an iterable such as a tuple, list, etc., the “map()” function is used in Python.

In Python, the “__init__()” function is used to initialize the value of the object attribute of the class. It calls automatically when the object is created

In Python, the function ” dataframe.isin() ” is used to determine whether every element/item in a data frame is included in a value.

To get the cross-product of the input vector arrays, the “np.cross()” function of the “Numpy” library is utilized in Python.

The “NameError: name ‘X’ is not defined” occurs in Python when the operated variable or function is not defined or accessed before defining it in the program

The exponent operators are used to calculate the exponent value of given numbers. The given numbers have two values i.e., base and exponent.

The “SyntaxError: invalid character” occurs in Python when an invalid or non-printable Unicode character is used in a Python program.

The “KeyError: 0 exception” occurs in Python when we try to access a “0” key in the given dictionary where the key value is not present.

The error “IndexError: tuple index out of range” occurs in Python when the accessed item does not exist in the given range of the tuple

In Python, the “min()” function returns the lowest value of multiple elements passed inside the parentheses or retrieves the lowest value of any iterable.

To fix the “ValueError: could not convert string to float” error, the “str.repalce()”, “re.findall()” and “try-except” is used in Python

This error occurs due to various reasons, such as not separating the list by comma, accessing a list incorrectly, or using the list as a dictionary.

In Python, the “ModuleNotFoundError: No module named numpy” occurs when the “numpy” library is imported without being installed.

The “ModuleNotFoundError: No module named cv2” problem occurs in a Python program when the OpenCV library is not installed on the system.

To split the elements of the list, the “split()” method, “List Comprehension”, “numpy.array_split()”, and “partition()” methods are used in Python.

To convert the string into an integer, the inbuilt “int()” function is utilized in Python. It returns “TypeErrors” while executing non-string or non-integer

To comment in Python, a hash symbol “#” is used at the start of any code line. String literals are also utilized to make comments in Python script.

To remove duplicate items from the list, the “set()”, “dict.fromkeys()”, “list comprehension”, and “empty list” along with “if” statements are used in Python.

To split a string into a list of characters, the “list()”, “extend()”, “List Comprehension”, and “for Loop” are utilized in the Python programs.