Learn Python Coding
Learn Python through simple, practical examples and real coding ideas. Clear explanations, useful snippets, and hands-on learning for anyone starting or improving their programming skills. Admin: @HusseinSheikho || @Hussein_Sheikho
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“Learn Python through simple, practical examples and real coding ideas. Clear explanations, useful snippets, and hands-on learning for anyone starting or improving their programming skills.
Admin: @HusseinSheikho || @Hussein_Sheikho”
بفضل وتيرة التحديث المرتفعة (أحدث البيانات بتاريخ 27 أغسطس, 2026) تحافظ القناة على حداثتها ومستوى وصول مرتفع. وتُظهر التحليلات تفاعلاً نشطاً من الجمهور، ما يجعلها نقطة تأثير مهمة ضمن فئة التكنولوجيات والتطبيقات.
add() adds an element to the set, update() combines several elements, and intersection() helps quickly find common values between data sets.
In the picture — the main methods and operations for working with set: addition, removal, union, intersection, difference, and set checks.
Save it to not lose it!
#Python #SetMethods #Coding #DataScience #Programming #HelloEncyclo
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👉 https://helloencyclo.com/?ref=HUSSEINSHEIKHOsafe = dict(config)
MappingProxyType creates a read-only proxy over a dictionary — writing through it becomes impossible, but the data is not copied.
readonly["debug"] = True # TypeError
At the same time, the proxy remains alive: if the original dictionary changes, the changes will automatically be reflected in the read-only view.
config["debug"] = True
This is especially useful for configurations, internal APIs, overall state, and data protection within libraries.
def get_settings():
return MappingProxyType(settings)
🔥 MappingProxyType allows you to provide a read-only view of the dictionary without copying and without the risk of mutation through the returned object.
#Python #Immutable #DataProtection #MappingProxyType #ProgrammingTips #NoCopy
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👉 https://helloencyclo.com/?ref=HUSSEINSHEIKHOfrom collections import Counter
# Initial list with duplicate elements
logs = ["error", "info", "error", "warning", "error", "info"]
# 1. Instantly count the number of occurrences
count_dict = Counter(logs)
print(count_dict) # Counter({'error': 3, 'info': 2, 'warning': 1})
# 2. Get the most frequent elements (Top-2)
print(count_dict.most_common(2)) # [('error', 3), ('info', 2)]
# 3. Set math for counters
clicks_day1 = Counter(item=4, banner=2)
clicks_day2 = Counter(item=1, banner=5)
# Combine the results of two days in a single operation
print(clicks_day1 + clicks_day2) # Counter({'banner': 7, 'item': 5})
Forget about manual loops and dictionaries 🚫🔄
When you need to count the frequency of words in a text, the distribution of log types, or popular products in a store, developers usually create an empty dictionary and write a loop with a check if key not in dict: dict[key] = 1. The Counter class takes all this dirty work on itself and makes it as efficient as possible.
— Automatic initialization: You no longer need to check if a key exists in the dictionary. If the element is not there, Counter will not throw a KeyError, but simply return 0. 🛡️
— Finding leaders without sorting: The most_common(k) method returns a list of the k most frequently occurring elements. Under the hood, Python uses optimized heap algorithms, which work much faster than a full dictionary sort via sorted(). 🏆
— Mathematical operations: You can add, subtract, intersect, and merge Counter objects. This turns them into a powerful tool for aggregating metrics and analytics from different data sources in a few lines of code. ➕➖
#Python #DataScience #Coding #Programming #Automation #DevOps
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