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Use the function:

a:=Hold[b,c];

b:=1;

c:=d;

d:=Hold[a,b,e];

e:=2;

SymbolDependencyGraph

[a,VertexLabels"Name",ImageSize150]

Retrieve the

ResourceFunction

:

ResourceFunction["SymbolDependencyGraph"]

SymbolDependencyGraph

Retrieve the

ResourceObject

:

ResourceObject["SymbolDependencyGraph"]

ResourceObject

Name: SymbolDependencyGraph
Type: Function
Description: Create a graph of symbol dependencies



See how a function relies on other functions:

SymbolDependencyGraph

[GeneralUtilities`PrintDefinitions,VertexLabelsPlaced["Name",Tooltip]]

See how symbols in a context are related:

symbols=ToExpression[Names["GeneralUtilities`*"],InputForm,HoldComplete];

g=

SymbolDependencyGraph

[symbols,VertexLabelsPlaced["Name",Tooltip]];

VertexDelete[g,"symbols"]