1. Variable 5.2. Expressions and statement 5.3. Comment 5.4. Indentation 6. Data Types 7. Operators 7.0.1. Assignment operator 7.0.2. Arithmetic operator 7.0.3. Comparison operator 7.0.4. Boolean We'll explore them all soon. 26 7. Operators Python operators are symbols that we use to run operations upon values and variables. We can divide operators based on the kind of operation they perform: perform: assignment operator arithmetic operators comparison operators logical operators bitwise operators plus some interesting ones like is and in . 7.0.1. Assignment operator The assignment

EXAMPLE: SET OPERATORS 51 SETS IN A FEW LANGUAGES AND PLATFORMS Some languages/platform APIs that implement sets in their standard libraries 52 Python set, frozenset: > 10 methods and operators Ruby Ruby Set: > 10 methods and operators Elixir MapSet: > 10 methods .Net (C# etc.) ISet interface: > 10 methods; 2 implementations JavaScript (ES6) Set: < 10 methods Java Set interface: < 10 methods; 8 in their standard libraries 53 Python set, frozenset: > 10 methods and operators ? Ruby Set: > 10 methods and operators ? Elixir MapSet: > 10 methods ? .Net (C# etc.) ISet interface: > 10 methods;

executed instead of the builtin operator. This can be used to fine tune the behavior of certain operators. New in version 2.6. call_unop(context, operator, arg) For intercepted unary operator calls executed instead of the builtin operator. This can be used to fine tune the behavior of certain operators. New in version 2.6. default_binop_table = {‘/’: , ‘%’: , ‘*’: } default callback table for the binary operators. A copy of this is available on each instance of a sandboxed environment as binop_table default_unop_table

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 1.8 Query operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 1 through it. • Example Twitter app written using Flask framework. • Guide to the various query operators describes how to construct queries and combine expressions. • Field types table lists the various exotic operations, like the postgresql HStore field acts like a key/value store and has custom operators for things like contains and update. You can specify custom operations as well. For example code

essentials. It will take you between 5 and 10 minutes to go through it. Guide to the various query operators describes how to construct queries and combine expressions. Field types table lists the various Retrieving row tuples / dictionaries / namedtuples Returning Clause Query operators Three valued logic Adding user-defined operators Expressions Foreign Keys Traversing foreign keys Joining tables Implementing = Facility.select(Facility.name) query = lhs | rhs Queries can be composed using the following operators: | - UNION + - UNION ALL & - INTERSECT - - EXCEPT Simple aggregation You’d like to get the signup

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 1.9 Query operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 1 • Example queries taken from the PostgreSQL exercises website. • Guide to the various query operators describes how to construct queries and combine expressions. • Field types table lists the various = Facility.select(Facility.name) query = lhs | rhs Queries can be composed using the following operators: • | - UNION • + - UNION ALL • & - INTERSECT • - - EXCEPT Simple aggregation You’d like to

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 1.9 Query operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 1 • Example queries taken from the PostgreSQL exercises website. • Guide to the various query operators describes how to construct queries and combine expressions. • Field types table lists the various = Facility.select(Facility.name) query = lhs | rhs Queries can be composed using the following operators: • | - UNION • + - UNION ALL • & - INTERSECT • - - EXCEPT Simple aggregation You’d like to

to go through it. Example Twitter app written using Flask framework. Guide to the various query operators describes how to construct queries and combine expressions. Field types table lists the various Joins Implementing Many to Many Self-joins Performance Techniques Query operators Three valued logic Adding user-defined operators Expressions SQL Functions SQL Helper Security and SQL Injection API Documentation exotic operations, like the postgresql HStore field acts like a key/value store and has custom operators for things like contains and update. You can specify custom operations as well. For example code

taken from the PostgreSQL exercises website [https://pgexercises.com]. Guide to the various query operators describes how to construct queries and combine expressions. Field types table lists the various Retrieving row tuples / dictionaries / namedtuples Returning Clause Query operators Three valued logic Adding user-defined operators Expressions Foreign Keys Traversing foreign keys Joining tables Implementing = Facility.select(Facility.name) query = lhs | rhs Queries can be composed using the following operators: | - UNION + - UNION ALL & - INTERSECT - - EXCEPT Simple aggregation You’d like to get the signup

taken from the PostgreSQL exercises website [https://pgexercises.com]. Guide to the various query operators describes how to construct queries and combine expressions. Field types table lists the various Retrieving row tuples / dictionaries / namedtuples Returning Clause Query operators Three valued logic Adding user-defined operators Expressions Foreign Keys Traversing foreign keys Joining tables Implementing = Facility.select(Facility.name) query = lhs | rhs Queries can be composed using the following operators: | - UNION + - UNION ALL & - INTERSECT - - EXCEPT Simple aggregation You’d like to get the signup