for i in range(1, 101): #生成18位随机身份证号,生成的随机数在100000000000000000,和999999999999999999之间 ID = random.randint(100000000000000000, 999999999999999999) #添加用户名到列表list中,用户名默认以test开头,后面跟上数字,数字是当前循环的次数,如:test1 list.append('test%s' % i) #添加用户密码到li...
Return the arctangent of y / x in radians. You can use ‘pi = atan2(0, -1)’ to retrieve the value of pi. 1. cos(x) Return the cosine of x, with x in radians. 1. exp(x) Return the exponential of x (e ^ x) or report an error if x is out of range. The range of v...
for user in allen mike jerry tracy han lilei do # $RANDOM is shell Built-in variable, it can generate a random number, range is [0, 32767] COUNT=$RANDOM NUM1=`create_random 1 $COUNT` NUM2=`expr $COUNT - $NUM1` echo "`date '+%Y-%m-%d %H:%M:%S'` $INDEX Batches: user $use...
常用数学计算函数atan2(y, x)Return the arctangent of y / x in radians. You can use 'pi = atan2(0, -1)' to retrieve the value of pi.cos(x)Return the cosine of x, with x in radians.exp(x)Return the exponential of x (e ^ x) or report an error if x is out of range. The...
returns a random floating-point number in the range 0 through 1. sin(expr),cos(expr) returns the sine and cosine of the numeric value ofexpr(interpreted as an angle in radians). srand(expr) sets the seed of therand()function to the integer value ofexpr. If you omit(expr),awkuses th...
We could even dispense with the spaces in the command ("("NR")") but I've kept them because they make things clearer. Next we print the actual line. Note the comma. It means awk will put a space (OFS) between the parenthesised line number and the actual line....
For example, to check if a string matches two patterns with any number of characters in between. Quantifiers can be applied to both characters and groupings. Apart from ability to specify exact quantity and bounded range, these can also match unbounded varying quantities. First up, the ? meta...
Example 1: Filtering by Price Range Suppose we want to filter products with a price between$10and$20, we can use a compound expression in Awk as shown. awk '$3 >= 10 && $3 <= 20 { print $0 }' tecmint_deals.txt Sample Output: ...
The ?: operator is like the same operator in C. If the first pattern is true then the pattern used for testing is the second pattern, otherwise it is the third. Only one of the second and third patterns is evaluated.The pattern1, pattern2 form of an expression is called a range ...
Return a random number N, between zero and one, such that 0 ≤ N < 1. sin(expr) Return the sine of expr, which is in radians. sqrt(expr) Return the square root of expr. srand([expr]) Use expr as the new seed for the random number generator. If no expr is provided, ...