Added basic commands

README.md

@@ -99,6 +99,240 @@ bottle.run(host='0.0.0.0', port=80, server='cherypy')
 
 Type
 ----
+```
+type(<el>) is int/str/set/list
+```
+```
+import numbers
+isinstance(<el>, numbers.Number)
+```
+
+Arguments
+---------
+```
+import sys
+sys.argv
+```
+
+Enumerate
+---------
+```
+for i, <el> in enumerate(<list>)
+```
+
+
+System Commands
+---------------
+### Read File
+```
+with open(<filename>, encoding='utf-8') as file:
+    return file.readlines()
+```
+
+### Write to File
+```
+with open(<filename>, 'w', enconding='utf-8') as file:
+    file.write(<text>)
+```
+
+### Execute Command
+```
+import os
+os.popen(<command>).read()
+```
+
+
+JSON
+----
+```
+import json
+```
+
+### Read File
+```
+with open(<filename>, encoding='utf-8') as file:
+    return json.load(file)
+```
+
+### Write to File
+```
+with open(<filename>, 'w', enconding='utf-8') as file:
+    file.write(json.dumps(<object>))
+```
+
+
+Datetime
+--------
+```
+import datetime
+now = datetime.datetime.now()
+now.strftime('%Y%m%d')
+now.strftime('%Y%m%d%H%M%S')
+```
+
+String
+------
+```
+str.replace(<text>, <old>, <new>)
+<str>.isnumeric()
+```
+
+Enum
+----
+```
+import enum
+class <name>(enum.Enum):
+    <value> = <index>
+```
+
+Copy
+----
+```
+import copy
+copy.copy(<object>)
+copy.deepcopy(<object>)
+```
+
+Infinity
+--------
+```
+float("inf")
+```
+
+Plot
+----
+```
+import matplotlib
+matplotlib.pyplot.plot(<data>, ...)
+matplotlib.pyplot.show()
+matplotlib.pyplot.savefig(<filename>)
+```
+
+List
+----
+```
+<list>[<inclusive from>:<exclusive to>:<step size>]
+```
+
+Lambda
+------
+```
+lambda <arg1>, <arg2>: <return value>
+lambda: <return value>
+```
+
+[For]
+-----
+```
+[i+1 for i in range(10)]
+[i+1 for i in range(10) if i > 5]
+[i+j for i in range(10) for j in range(10)]
+```
+
+Class
+-----
+```
+class <name>:
+    def __init__(self, <arg>):
+        self.a = <arg>
+    def __repr__(self):
+        return str({'a': self.a})
+    def __str__(self):
+        return str(self.a)
+```
+
+Random
+------
+```
+import random
+random.random()
+random.randint(<from inclusive>, <to inclusive>)
+random.shuffle(<list>)
+```
+
+Range
+-----
+```
+range(<to exclusive>)
+range(<from inclusive>, <to exclusive>)
+range(<from inclusive>, <to exclusive>, <step size>)  # Negative step for backward
+```
+
+List
+----
+```
+<list>.sort()
+<list>.reverse()
+<list>.extend(<list>)
+```
+
+Print
+-----
+```
+print(<el1>, <el2>, end='', sep='', file=<file>)
+```
+
+Format
+------
+```
+'{}'.format(<el>)
+```
+
+```
+{:<min width>}  -> '<el>    '
+{:><min width>} -> '    <el>'
+{:^<min width>} -> '  <el>  '
+{:_<min width>}  -> '<el>____'
+{:.<max width>} -> '<e>'
+{:<max widht>.<min width>} -> '    <e>'
+{:<max width>.<no of decimals>f} -> '  3.14'
+```
+
+Text Wrap
+---------
+```
+import textwrap
+textwrap.wrap(<text>, <width>)
+```
+
+Dictionary
+----------
+<dict>.items()
+<dict>.get(<key>, <default>)
+<dict>.setdefault(<key>, <default>)
+```
+
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