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| A | B | C | ||
|---|---|---|---|---|
| Concept | Syntax Example | Multiple Use Cases | Real-Life Example (Daily Work) | |
| Enumerate | enumerate(data) | Indexing, row tracking, progress logs. | Numbering search results in a UI list. | |
| Map | map(int, strings) | Batch casting, scrubbing, normalization. | Converting API string prices into floats. | |
| Filter | filter(func, data) | Pruning data, permission checks, exclusion. | Removing "Inactive" users from a mailing list. | |
| Lambda | lambda x: x.id | Sort keys, inline logic, callbacks. | Sorting user objects by created_at. | |
| Zip | zip(list_a, list_b) | Pairing data, building dicts, merging. | Mapping CSV headers to row data. | |
| Zip Strict | zip(a, b, strict=True) | Safe merging, length validation. | Ensuring emails and user_ids match in size. | |
| Any | any([c1, c2]) | Permission checks, "at least one" logic. | Checking if a user has any required role. | |
| All | all([c1, c2]) | Bulk validation, "everything" checks. | Verifying all required form fields are filled. | |
| List Comp | [x.id for x in data] | Extracting IDs, mapping, list creation. | Getting clean IDs from a database result. | |
| Dict Comp | {x.id: x for x in l} | ID mapping, swapping keys/values. | Creating a fast id -> object lookup map. | |
| Set Comp | {x.tag for x in l} | Unique extraction, membership testing. | Getting unique categories from 1,000 posts. | |
| Gen Exp | (x for x in huge) | Memory efficiency, lazy streaming. | Processing 1M logs without crashing RAM. | |
| Walrus | if (u := get()): | Inline assign, reducing redundant calls. | Fetching a record and checking it in one line. | |
| Sorted | sorted(l, key=f) | Custom ordering, priority levels. | Sorting products by "Price" then "Rating". | |
| Reversed | reversed(data) | Backwards iteration, recent-first logic. | Showing recent notifications at the top. | |
| Sum | sum(iterable) | Totals, merging lists, counting. | Calculating "Total Cart Value" at checkout. | |
| Min / Max | max(l, key=f) | Finding extremes, bounds checking. | Finding the "Highest Rated" item in a list. | |
| Next | next(it, default) | First-match-only, manual stepping. | Fetching the "First Available" worker. | |
| Iter (Basic) | iter(data) | Converting to stream, manual control. | Stepping through a data buffer chunk by chunk. | |
| Iter Sentinel | iter(f, stop) | Breaking on specific value/stream end. | Reading a file until an "END" line is found. | |
| Star Unpack | a, *b, c = list | Head/Tail logic, variable processing. | Splitting a command into action and params. | |
| Nested Unpack | (a, b), c = data | Complex structure extraction. | Unpacking ((lat, lon), city_name) pairs. | |
| Inline If | x if cond else y | Ternary logic, UI label formatting. | Displaying "Paid" or "Pending" labels. | |
| Callable | callable(obj) | Verifying executable status, safety. | Checking if a plugin attribute is a function. | |
| Len | len(container) | Size checks, pagination, empty checks. | Checking if search results have any items. | |
| Dir | dir(obj) | Introspection, discovery, debugging. | Finding all methods available on an object. | |
| Slicing | l[start:stop:step] | Data windows, sampling, reversing. | Getting the "Recent 5" items from a list. | |
| Frozenset | frozenset(l) | Immutable sets, hashable dict keys. | Using a group of tags as a cache dict key. | |
| Set Ops | a | b, a & b | Union/Intersection, commonalities. | Finding "Mutual Friends" between users. | |
| Format | format(v, '.2f') | Precise rounding, report padding. | Rounding tax to exactly 2 decimal places. | |
| Join | " ".join(list) | Building messages, joining paths. | Merging error messages into one string. | |
| Range | range(n) | Lazy sequence generation, loops. | Generating page numbers for a web grid. | |
| Isinstance | isinstance(o, t) | Inheritance-aware type verification. | Checking if data is a BaseModel. | |
| Issubclass | issubclass(A, B) | Checking interface compliance. | Verifying a Class inherits from a Mixin. | |
| Globals | globals() | Dynamic variable access. | Fetching a Class by its string name. | |
| Locals | locals() | Debugging local scope variables. | Inspecting variables during a crash log. | |
| Abs | abs(n) | Distance math, normalization. | Calculating price differences. | |
| Round | round(n, 2) | Formatting, cleaning float results. | Finalizing a total for a payment gateway. | |
| Divmod | divmod(a, b) | Quotient/Remainder math, paging. | Calculating (total_pages, remainder). | |
| Bool | bool(x) | Truthiness conversion, logic guards. | Forcing a "Truthiness" check on custom data. | |
| Attribute Check | hasattr(o, 'a') | Dynamic property checking, safety. | Checking if an object has a .save() method. | |
| Getattr | getattr(o, 'k') | Dynamic string-based access. | Accessing attributes using strings from JSON. | |
| Setattr | setattr(o, 'k',v) | Dynamic object updates. | Mapping JSON fields to an object's state. | |
| Delattr | delattr(o, 'k') | Removing dynamic attributes. | Cleaning up temporary properties on an object. | |
| Vars | vars(obj) | Converting instances to dicts. | Dumping object data into a JSON response. | |
| Id | id(obj) | Memory address verification. | Checking if two variables are the same object. | |
| Hash | hash(obj) | Key generation, integrity. | Using a custom object as a dictionary key. | |
| Type() | type(obj) | Strict type checking. | Verifying exact class (no inheritance). | |
| In / Not In | x in container | Membership and exclusion logic. | Ensuring a "Username" is not already taken. | |
| Multi-Assign | x, y = y, x | Variable swapping, clean init. | Swapping values without a temporary variable. | |
| F-String Logic | f"{x + y}" | Evaluating math inside strings. | Building dynamic alert messages for users. | |
| F-String Align | f"{x:<10}" | CLI table formatting, padding. | Creating aligned terminal reports. | |
| Closure State | nonlocal count | Counter persistence in functions. | Creating a unique ID generator function. | |
| Short-circuit | a or b | Default value setting. | name = input() or "Guest". | |
| And logic | valid and save() | Conditional execution. | Saving a form only if validation passes. | |
| Unpacking (*) | f(*args) | Dynamic function calling. | Passing a list of parameters to an API call. | |
| Kwarg Unpack | f(**kwargs) | Dynamic setting injection. | Passing a dictionary of config to a class. | |
| Set Union | s.union(o) | Merging unique datasets. | Combining two different subscriber lists. | |
| Set Diff | s.difference(o) | Exclusion logic. | Finding users in list A but NOT in list B. | |
| Pow | pow(b, e) | Exponential math. | Calculating growth rates or interest. | |
| Truthy Empty | if not my_list: | Pythonic empty check. | Aborting if no search results are found. | |
| Help | help(obj) | CLI Documentation. | Checking method usage in the terminal. | |
| Ord / Chr | ord('A') | Character math/logic. | Creating simple custom text filters. | |
| Bin/Hex/Oct | bin(n) | Numeric representation. | Creating flag-based permission strings. | |
| Int(str, base) | int('10', 2) | Parsing different number formats. | Converting binary/hex strings to numbers. | |
| Complex | complex(r, i) | Vector calculations. | Handling coordinates in a 2D grid. | |
| Repr vs Str | repr(o) / str(o) | Debug vs End-user view. | Printing detailed logs vs UI labels. | |
| List(it) | list(map(...)) | Consuming lazy streams. | Turning a lazy filter into a reusable list. | |
| Tuple Literal | x = 1, 2 | Implicit tuple creation. | Returning multiple values from a function. | |
| Set intersection | a & b | Finding commonalities. | Finding "Common Followers" between users. | |
| Set Symm Diff | a ^ b | Finding unique differences. | Finding items in A or B, but not both. | |
| Is Disjoint | a.isdisjoint(b) | Overlap check. | Verifying two user groups have zero overlap. | |
| Ellipsis | ... | Placeholder logic. | Using ... as a "To-Do" in code. | |
| Sorted reverse | sorted(l, rev=T) | Descending order. | Getting "Top 10" highest prices. | |
| Slice step | l[::-1] | Reversing data. | Fast string reversal for UI effects. | |
| Slice copy | l[:] | Shallow copying. | Creating a list copy to safely modify. | |
| Format padding | format(x, '0>5') | Serial numbering. | Turning 7 into "00007" for IDs. | |
| Bytearray | bytearray(data) | Buffer modification. | Editing raw image data in memory. | |
| Memoryview | memoryview(obj) | Efficient binary slicing. | Handling large file chunks without RAM copy. | |
| Globals get | globals()['x'] | Safe dynamic variable lookup. | Fetching a global setting by string name. | |
| Locals keys | x' in locals() | Variable existence check. | Verifying if a variable was defined in scope. | |
| Comparison Chain | 1 < x < 10 | Range validation. | Checking if age is between 18 and 65. | |
| Truthy check | bool(obj) | State verification. | Checking if an object has "Value". | |
| Ascii | ascii(obj) | Log escaping. | Safe-printing strings with emojis to logs. | |
| Compile | compile(str) | Dynamic code prep. | Pre-compiling user-input math formulas. | |
| Eval | eval(str) | Result calculation. | Running a math calculation from a string. | |
| Exec | exec(str) | Dynamic code execution. | Running dynamically generated scripts. | |
| Object() | object() | Sentinel creation. | Creating a unique NOT_FOUND marker. | |
| Property() | property(f) | Attribute calculation. | Creating a read-only field in a class. | |
| Static Method | staticmethod(f) | Namespace grouping. | Adding a helper function inside a class. | |
| Class Method | classmethod(f) | Alternative constructors. | User.from_email(address) logic. | |
| Super() | super().func() | Parent delegation. | Adding setup logic to an inherited class. | |
| Self | self.attr | Instance referencing. | Modifying a specific object's state. | |
| Id check | id(a) == id(b) | Identity verification. | Ensuring two objects are the same in memory. | |
| Iter next pair | (next(i), next(i)) | Chunking data. | Processing a list in pairs of two. | |
| F-string expr | f"{x.upper()}" | Formatting logic. | Converting names to uppercase in a string. | |
| F-string debug | f"{x=}" | Quick variable logging. | Printing x=10 instantly for debugging. | |
| Starred return | return *a, b | Multi-value merging. | Returning a list plus a flag from a function. | |
| None check | if x is None: | Null safety. | Checking if an API call returned no data. | |
| Builtins | __builtins__ | Namespace inspection. | Accessing core functions programmatically. |
