Python Strings in Algorithmic Trading & Crypto Strategies 3/100 Days
Welcome back to Day 3 of 100 Days of Hell with Python Algo Trading! Today, we focus on one of the fundamental concepts in Python – Strings. Strong fundamentals are crucial because, as they say, “The devil is in the details.” We’ll explore Python strings, their encoding (ASCII vs Unicode), and operations like creation, indexing, and slicing—all essential for quantitative traders and crypto trading strategies. Let’s dive in and code with real-world examples!
I always say fundamentals should be very strong because devil in the details that was quoted 100 Years Ago by the frish wilham so first we understand what are python strings so python strings are the sequence of uni code characters what do you mean by uni code so let me quickly explain so so the earlier Lang is used as Sky characters okay but python uses Unicode correct what is the exact difference between ski characters and unicode as both the ski and unicode are the character.
Encoding standards but they differ significantly in their in terms of their scope functionality and capacity so let’s quickly understand that okay so ski standards can hold only up to 128 characters whereas Unicode characters can hold a significantly large number of characters which is which is 14300 SK standards are limited to English alphabets and digits and some control and special characters okay so some control and special characters where as unicode is a comprehensive encoding standards designed to support the characters from all the writing systems in the world as well as symbols emojis and various control characters.
We can say all writing systems emojis and so many special characters okay when comes to the encoding size it uses seven character per bits whereas Unicode has variable sizes and and multiple encoding forms like utfa 16 and 32 which can be 1 to 4 bytes per character and then we can say sky was historically used for basic text representation in English and unicode was universally accepted for modern text processing supporting multiple languages and symbols now now we will learn various things on python strings.
Like how to create a string how to edit a string how to delete a string and there are multiple operations functions of string so we’ll learn all those one by one then we will quickly move to the screen and we’ll code some examples okay so first of all we have how to create strings first is creating strings we can can create strings with with single Cotes double quotes or triple codes right in single codes like we want to create a strategy name so what we can do we can just write strategy name right it’s underscore and the same.
We can achieve with double codes also so strategy name that also right and when we have multiple line of strings right so how we can write that so what we will do we will write like hello algo Traders we are here to learn Al go trading correct and then you’ll close the triple codes so these are the various ways and again like why we need to use these two different type of notations like single quote and double quote so for example when we have something like let’s say we are writing a string like it’s as string right so now we know that we have a single quote outside correct but inside also for its we have one code right one single code so the python will get confused and it might select only this part right so in those cases when we have a single code already inside the string then we have to use a double quotes right so in that case you can use a double strings so that’s a basic difference so now what I’m doing I will quickly explain you this then we will move to the coding part so second.
We have accessing strings right accessing strings so for example we have a string and which is like moving crossovers strategy moving crossover strategy right so here if you think then we can say that this m is at the index of zero correct and this is at the last so now we don’t know what is index but we know that it is at the last so in Python when you have a large string so you can just simply say that the last character will be at the negative -1 index so you can blindly say the first will be zero and last will be minus one that is the indexing system of the Python correct so let’s say now we want to access the first character of a string so what you can do now what you can do you can just write a variable name then then you give a square bracket okay and inside that you write the index.
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Day 3: Python Strings
